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2108 mathias 1
/*  Prototype JavaScript framework, version 1.6.0.2
2
 *  (c) 2005-2008 Sam Stephenson
3
 *
4
 *  Prototype is freely distributable under the terms of an MIT-style license.
5
 *  For details, see the Prototype web site: http://www.prototypejs.org/
6
 *
7
 *--------------------------------------------------------------------------*/
8
 
9
var Prototype = {
10
  Version: '1.6.0.2',
11
 
12
  Browser: {
13
    IE:     !!(window.attachEvent && !window.opera),
14
    Opera:  !!window.opera,
15
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
16
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
17
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
18
  },
19
 
20
  BrowserFeatures: {
21
    XPath: !!document.evaluate,
22
    ElementExtensions: !!window.HTMLElement,
23
    SpecificElementExtensions:
24
      document.createElement('div').__proto__ &&
25
      document.createElement('div').__proto__ !==
26
        document.createElement('form').__proto__
27
  },
28
 
29
  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
30
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
31
 
32
  emptyFunction: function() { },
33
  K: function(x) { return x }
34
};
35
 
36
if (Prototype.Browser.MobileSafari)
37
  Prototype.BrowserFeatures.SpecificElementExtensions = false;
38
 
39
 
40
/* Based on Alex Arnell's inheritance implementation. */
41
var Class = {
42
  create: function() {
43
    var parent = null, properties = $A(arguments);
44
    if (Object.isFunction(properties[0]))
45
      parent = properties.shift();
46
 
47
    function klass() {
48
      this.initialize.apply(this, arguments);
49
    }
50
 
51
    Object.extend(klass, Class.Methods);
52
    klass.superclass = parent;
53
    klass.subclasses = [];
54
 
55
    if (parent) {
56
      var subclass = function() { };
57
      subclass.prototype = parent.prototype;
58
      klass.prototype = new subclass;
59
      parent.subclasses.push(klass);
60
    }
61
 
62
    for (var i = 0; i < properties.length; i++)
63
      klass.addMethods(properties[i]);
64
 
65
    if (!klass.prototype.initialize)
66
      klass.prototype.initialize = Prototype.emptyFunction;
67
 
68
    klass.prototype.constructor = klass;
69
 
70
    return klass;
71
  }
72
};
73
 
74
Class.Methods = {
75
  addMethods: function(source) {
76
    var ancestor   = this.superclass && this.superclass.prototype;
77
    var properties = Object.keys(source);
78
 
79
    if (!Object.keys({ toString: true }).length)
80
      properties.push("toString", "valueOf");
81
 
82
    for (var i = 0, length = properties.length; i < length; i++) {
83
      var property = properties[i], value = source[property];
84
      if (ancestor && Object.isFunction(value) &&
85
          value.argumentNames().first() == "$super") {
86
        var method = value, value = Object.extend((function(m) {
87
          return function() { return ancestor[m].apply(this, arguments) };
88
        })(property).wrap(method), {
89
          valueOf:  function() { return method },
90
          toString: function() { return method.toString() }
91
        });
92
      }
93
      this.prototype[property] = value;
94
    }
95
 
96
    return this;
97
  }
98
};
99
 
100
var Abstract = { };
101
 
102
Object.extend = function(destination, source) {
103
  for (var property in source)
104
    destination[property] = source[property];
105
  return destination;
106
};
107
 
108
Object.extend(Object, {
109
  inspect: function(object) {
110
    try {
111
      if (Object.isUndefined(object)) return 'undefined';
112
      if (object === null) return 'null';
113
      return object.inspect ? object.inspect() : String(object);
114
    } catch (e) {
115
      if (e instanceof RangeError) return '...';
116
      throw e;
117
    }
118
  },
119
 
120
  toJSON: function(object) {
121
    var type = typeof object;
122
    switch (type) {
123
      case 'undefined':
124
      case 'function':
125
      case 'unknown': return;
126
      case 'boolean': return object.toString();
127
    }
128
 
129
    if (object === null) return 'null';
130
    if (object.toJSON) return object.toJSON();
131
    if (Object.isElement(object)) return;
132
 
133
    var results = [];
134
    for (var property in object) {
135
      var value = Object.toJSON(object[property]);
136
      if (!Object.isUndefined(value))
137
        results.push(property.toJSON() + ': ' + value);
138
    }
139
 
140
    return '{' + results.join(', ') + '}';
141
  },
142
 
143
  toQueryString: function(object) {
144
    return $H(object).toQueryString();
145
  },
146
 
147
  toHTML: function(object) {
148
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
149
  },
150
 
151
  keys: function(object) {
152
    var keys = [];
153
    for (var property in object)
154
      keys.push(property);
155
    return keys;
156
  },
157
 
158
  values: function(object) {
159
    var values = [];
160
    for (var property in object)
161
      values.push(object[property]);
162
    return values;
163
  },
164
 
165
  clone: function(object) {
166
    return Object.extend({ }, object);
167
  },
168
 
169
  isElement: function(object) {
170
    return object && object.nodeType == 1;
171
  },
172
 
173
  isArray: function(object) {
174
    return object != null && typeof object == "object" &&
175
      'splice' in object && 'join' in object;
176
  },
177
 
178
  isHash: function(object) {
179
    return object instanceof Hash;
180
  },
181
 
182
  isFunction: function(object) {
183
    return typeof object == "function";
184
  },
185
 
186
  isString: function(object) {
187
    return typeof object == "string";
188
  },
189
 
190
  isNumber: function(object) {
191
    return typeof object == "number";
192
  },
193
 
194
  isUndefined: function(object) {
195
    return typeof object == "undefined";
196
  }
197
});
198
 
199
Object.extend(Function.prototype, {
200
  argumentNames: function() {
201
    var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
202
    return names.length == 1 && !names[0] ? [] : names;
203
  },
204
 
205
  bind: function() {
206
    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
207
    var __method = this, args = $A(arguments), object = args.shift();
208
    return function() {
209
      return __method.apply(object, args.concat($A(arguments)));
210
    }
211
  },
212
 
213
  bindAsEventListener: function() {
214
    var __method = this, args = $A(arguments), object = args.shift();
215
    return function(event) {
216
      return __method.apply(object, [event || window.event].concat(args));
217
    }
218
  },
219
 
220
  curry: function() {
221
    if (!arguments.length) return this;
222
    var __method = this, args = $A(arguments);
223
    return function() {
224
      return __method.apply(this, args.concat($A(arguments)));
225
    }
226
  },
227
 
228
  delay: function() {
229
    var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
230
    return window.setTimeout(function() {
231
      return __method.apply(__method, args);
232
    }, timeout);
233
  },
234
 
235
  wrap: function(wrapper) {
236
    var __method = this;
237
    return function() {
238
      return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
239
    }
240
  },
241
 
242
  methodize: function() {
243
    if (this._methodized) return this._methodized;
244
    var __method = this;
245
    return this._methodized = function() {
246
      return __method.apply(null, [this].concat($A(arguments)));
247
    };
248
  }
249
});
250
 
251
Function.prototype.defer = Function.prototype.delay.curry(0.01);
252
 
253
Date.prototype.toJSON = function() {
254
  return '"' + this.getUTCFullYear() + '-' +
255
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
256
    this.getUTCDate().toPaddedString(2) + 'T' +
257
    this.getUTCHours().toPaddedString(2) + ':' +
258
    this.getUTCMinutes().toPaddedString(2) + ':' +
259
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
260
};
261
 
262
var Try = {
263
  these: function() {
264
    var returnValue;
265
 
266
    for (var i = 0, length = arguments.length; i < length; i++) {
267
      var lambda = arguments[i];
268
      try {
269
        returnValue = lambda();
270
        break;
271
      } catch (e) { }
272
    }
273
 
274
    return returnValue;
275
  }
276
};
277
 
278
RegExp.prototype.match = RegExp.prototype.test;
279
 
280
RegExp.escape = function(str) {
281
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
282
};
283
 
284
/*--------------------------------------------------------------------------*/
285
 
286
var PeriodicalExecuter = Class.create({
287
  initialize: function(callback, frequency) {
288
    this.callback = callback;
289
    this.frequency = frequency;
290
    this.currentlyExecuting = false;
291
 
292
    this.registerCallback();
293
  },
294
 
295
  registerCallback: function() {
296
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
297
  },
298
 
299
  execute: function() {
300
    this.callback(this);
301
  },
302
 
303
  stop: function() {
304
    if (!this.timer) return;
305
    clearInterval(this.timer);
306
    this.timer = null;
307
  },
308
 
309
  onTimerEvent: function() {
310
    if (!this.currentlyExecuting) {
311
      try {
312
        this.currentlyExecuting = true;
313
        this.execute();
314
      } finally {
315
        this.currentlyExecuting = false;
316
      }
317
    }
318
  }
319
});
320
Object.extend(String, {
321
  interpret: function(value) {
322
    return value == null ? '' : String(value);
323
  },
324
  specialChar: {
325
    '\b': '\\b',
326
    '\t': '\\t',
327
    '\n': '\\n',
328
    '\f': '\\f',
329
    '\r': '\\r',
330
    '\\': '\\\\'
331
  }
332
});
333
 
334
Object.extend(String.prototype, {
335
  gsub: function(pattern, replacement) {
336
    var result = '', source = this, match;
337
    replacement = arguments.callee.prepareReplacement(replacement);
338
 
339
    while (source.length > 0) {
340
      if (match = source.match(pattern)) {
341
        result += source.slice(0, match.index);
342
        result += String.interpret(replacement(match));
343
        source  = source.slice(match.index + match[0].length);
344
      } else {
345
        result += source, source = '';
346
      }
347
    }
348
    return result;
349
  },
350
 
351
  sub: function(pattern, replacement, count) {
352
    replacement = this.gsub.prepareReplacement(replacement);
353
    count = Object.isUndefined(count) ? 1 : count;
354
 
355
    return this.gsub(pattern, function(match) {
356
      if (--count < 0) return match[0];
357
      return replacement(match);
358
    });
359
  },
360
 
361
  scan: function(pattern, iterator) {
362
    this.gsub(pattern, iterator);
363
    return String(this);
364
  },
365
 
366
  truncate: function(length, truncation) {
367
    length = length || 30;
368
    truncation = Object.isUndefined(truncation) ? '...' : truncation;
369
    return this.length > length ?
370
      this.slice(0, length - truncation.length) + truncation : String(this);
371
  },
372
 
373
  strip: function() {
374
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
375
  },
376
 
377
  stripTags: function() {
378
    return this.replace(/<\/?[^>]+>/gi, '');
379
  },
380
 
381
  stripScripts: function() {
382
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
383
  },
384
 
385
  extractScripts: function() {
386
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
387
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
388
    return (this.match(matchAll) || []).map(function(scriptTag) {
389
      return (scriptTag.match(matchOne) || ['', ''])[1];
390
    });
391
  },
392
 
393
  evalScripts: function() {
394
    return this.extractScripts().map(function(script) { return eval(script) });
395
  },
396
 
397
  escapeHTML: function() {
398
    var self = arguments.callee;
399
    self.text.data = this;
400
    return self.div.innerHTML;
401
  },
402
 
403
  unescapeHTML: function() {
404
    var div = new Element('div');
405
    div.innerHTML = this.stripTags();
406
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
407
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
408
      div.childNodes[0].nodeValue) : '';
409
  },
410
 
411
  toQueryParams: function(separator) {
412
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
413
    if (!match) return { };
414
 
415
    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
416
      if ((pair = pair.split('='))[0]) {
417
        var key = decodeURIComponent(pair.shift());
418
        var value = pair.length > 1 ? pair.join('=') : pair[0];
419
        if (value != undefined) value = decodeURIComponent(value);
420
 
421
        if (key in hash) {
422
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
423
          hash[key].push(value);
424
        }
425
        else hash[key] = value;
426
      }
427
      return hash;
428
    });
429
  },
430
 
431
  toArray: function() {
432
    return this.split('');
433
  },
434
 
435
  succ: function() {
436
    return this.slice(0, this.length - 1) +
437
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
438
  },
439
 
440
  times: function(count) {
441
    return count < 1 ? '' : new Array(count + 1).join(this);
442
  },
443
 
444
  camelize: function() {
445
    var parts = this.split('-'), len = parts.length;
446
    if (len == 1) return parts[0];
447
 
448
    var camelized = this.charAt(0) == '-'
449
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
450
      : parts[0];
451
 
452
    for (var i = 1; i < len; i++)
453
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
454
 
455
    return camelized;
456
  },
457
 
458
  capitalize: function() {
459
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
460
  },
461
 
462
  underscore: function() {
463
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
464
  },
465
 
466
  dasherize: function() {
467
    return this.gsub(/_/,'-');
468
  },
469
 
470
  inspect: function(useDoubleQuotes) {
471
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
472
      var character = String.specialChar[match[0]];
473
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
474
    });
475
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
476
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
477
  },
478
 
479
  toJSON: function() {
480
    return this.inspect(true);
481
  },
482
 
483
  unfilterJSON: function(filter) {
484
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
485
  },
486
 
487
  isJSON: function() {
488
    var str = this;
489
    if (str.blank()) return false;
490
    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
491
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
492
  },
493
 
494
  evalJSON: function(sanitize) {
495
    var json = this.unfilterJSON();
496
    try {
497
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
498
    } catch (e) { }
499
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
500
  },
501
 
502
  include: function(pattern) {
503
    return this.indexOf(pattern) > -1;
504
  },
505
 
506
  startsWith: function(pattern) {
507
    return this.indexOf(pattern) === 0;
508
  },
509
 
510
  endsWith: function(pattern) {
511
    var d = this.length - pattern.length;
512
    return d >= 0 && this.lastIndexOf(pattern) === d;
513
  },
514
 
515
  empty: function() {
516
    return this == '';
517
  },
518
 
519
  blank: function() {
520
    return /^\s*$/.test(this);
521
  },
522
 
523
  interpolate: function(object, pattern) {
524
    return new Template(this, pattern).evaluate(object);
525
  }
526
});
527
 
528
if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
529
  escapeHTML: function() {
530
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
531
  },
532
  unescapeHTML: function() {
533
    return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
534
  }
535
});
536
 
537
String.prototype.gsub.prepareReplacement = function(replacement) {
538
  if (Object.isFunction(replacement)) return replacement;
539
  var template = new Template(replacement);
540
  return function(match) { return template.evaluate(match) };
541
};
542
 
543
String.prototype.parseQuery = String.prototype.toQueryParams;
544
 
545
Object.extend(String.prototype.escapeHTML, {
546
  div:  document.createElement('div'),
547
  text: document.createTextNode('')
548
});
549
 
550
with (String.prototype.escapeHTML) div.appendChild(text);
551
 
552
var Template = Class.create({
553
  initialize: function(template, pattern) {
554
    this.template = template.toString();
555
    this.pattern = pattern || Template.Pattern;
556
  },
557
 
558
  evaluate: function(object) {
559
    if (Object.isFunction(object.toTemplateReplacements))
560
      object = object.toTemplateReplacements();
561
 
562
    return this.template.gsub(this.pattern, function(match) {
563
      if (object == null) return '';
564
 
565
      var before = match[1] || '';
566
      if (before == '\\') return match[2];
567
 
568
      var ctx = object, expr = match[3];
569
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
570
      match = pattern.exec(expr);
571
      if (match == null) return before;
572
 
573
      while (match != null) {
574
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
575
        ctx = ctx[comp];
576
        if (null == ctx || '' == match[3]) break;
577
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
578
        match = pattern.exec(expr);
579
      }
580
 
581
      return before + String.interpret(ctx);
582
    });
583
  }
584
});
585
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
586
 
587
var $break = { };
588
 
589
var Enumerable = {
590
  each: function(iterator, context) {
591
    var index = 0;
592
    iterator = iterator.bind(context);
593
    try {
594
      this._each(function(value) {
595
        iterator(value, index++);
596
      });
597
    } catch (e) {
598
      if (e != $break) throw e;
599
    }
600
    return this;
601
  },
602
 
603
  eachSlice: function(number, iterator, context) {
604
    iterator = iterator ? iterator.bind(context) : Prototype.K;
605
    var index = -number, slices = [], array = this.toArray();
606
    while ((index += number) < array.length)
607
      slices.push(array.slice(index, index+number));
608
    return slices.collect(iterator, context);
609
  },
610
 
611
  all: function(iterator, context) {
612
    iterator = iterator ? iterator.bind(context) : Prototype.K;
613
    var result = true;
614
    this.each(function(value, index) {
615
      result = result && !!iterator(value, index);
616
      if (!result) throw $break;
617
    });
618
    return result;
619
  },
620
 
621
  any: function(iterator, context) {
622
    iterator = iterator ? iterator.bind(context) : Prototype.K;
623
    var result = false;
624
    this.each(function(value, index) {
625
      if (result = !!iterator(value, index))
626
        throw $break;
627
    });
628
    return result;
629
  },
630
 
631
  collect: function(iterator, context) {
632
    iterator = iterator ? iterator.bind(context) : Prototype.K;
633
    var results = [];
634
    this.each(function(value, index) {
635
      results.push(iterator(value, index));
636
    });
637
    return results;
638
  },
639
 
640
  detect: function(iterator, context) {
641
    iterator = iterator.bind(context);
642
    var result;
643
    this.each(function(value, index) {
644
      if (iterator(value, index)) {
645
        result = value;
646
        throw $break;
647
      }
648
    });
649
    return result;
650
  },
651
 
652
  findAll: function(iterator, context) {
653
    iterator = iterator.bind(context);
654
    var results = [];
655
    this.each(function(value, index) {
656
      if (iterator(value, index))
657
        results.push(value);
658
    });
659
    return results;
660
  },
661
 
662
  grep: function(filter, iterator, context) {
663
    iterator = iterator ? iterator.bind(context) : Prototype.K;
664
    var results = [];
665
 
666
    if (Object.isString(filter))
667
      filter = new RegExp(filter);
668
 
669
    this.each(function(value, index) {
670
      if (filter.match(value))
671
        results.push(iterator(value, index));
672
    });
673
    return results;
674
  },
675
 
676
  include: function(object) {
677
    if (Object.isFunction(this.indexOf))
678
      if (this.indexOf(object) != -1) return true;
679
 
680
    var found = false;
681
    this.each(function(value) {
682
      if (value == object) {
683
        found = true;
684
        throw $break;
685
      }
686
    });
687
    return found;
688
  },
689
 
690
  inGroupsOf: function(number, fillWith) {
691
    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
692
    return this.eachSlice(number, function(slice) {
693
      while(slice.length < number) slice.push(fillWith);
694
      return slice;
695
    });
696
  },
697
 
698
  inject: function(memo, iterator, context) {
699
    iterator = iterator.bind(context);
700
    this.each(function(value, index) {
701
      memo = iterator(memo, value, index);
702
    });
703
    return memo;
704
  },
705
 
706
  invoke: function(method) {
707
    var args = $A(arguments).slice(1);
708
    return this.map(function(value) {
709
      return value[method].apply(value, args);
710
    });
711
  },
712
 
713
  max: function(iterator, context) {
714
    iterator = iterator ? iterator.bind(context) : Prototype.K;
715
    var result;
716
    this.each(function(value, index) {
717
      value = iterator(value, index);
718
      if (result == null || value >= result)
719
        result = value;
720
    });
721
    return result;
722
  },
723
 
724
  min: function(iterator, context) {
725
    iterator = iterator ? iterator.bind(context) : Prototype.K;
726
    var result;
727
    this.each(function(value, index) {
728
      value = iterator(value, index);
729
      if (result == null || value < result)
730
        result = value;
731
    });
732
    return result;
733
  },
734
 
735
  partition: function(iterator, context) {
736
    iterator = iterator ? iterator.bind(context) : Prototype.K;
737
    var trues = [], falses = [];
738
    this.each(function(value, index) {
739
      (iterator(value, index) ?
740
        trues : falses).push(value);
741
    });
742
    return [trues, falses];
743
  },
744
 
745
  pluck: function(property) {
746
    var results = [];
747
    this.each(function(value) {
748
      results.push(value[property]);
749
    });
750
    return results;
751
  },
752
 
753
  reject: function(iterator, context) {
754
    iterator = iterator.bind(context);
755
    var results = [];
756
    this.each(function(value, index) {
757
      if (!iterator(value, index))
758
        results.push(value);
759
    });
760
    return results;
761
  },
762
 
763
  sortBy: function(iterator, context) {
764
    iterator = iterator.bind(context);
765
    return this.map(function(value, index) {
766
      return {value: value, criteria: iterator(value, index)};
767
    }).sort(function(left, right) {
768
      var a = left.criteria, b = right.criteria;
769
      return a < b ? -1 : a > b ? 1 : 0;
770
    }).pluck('value');
771
  },
772
 
773
  toArray: function() {
774
    return this.map();
775
  },
776
 
777
  zip: function() {
778
    var iterator = Prototype.K, args = $A(arguments);
779
    if (Object.isFunction(args.last()))
780
      iterator = args.pop();
781
 
782
    var collections = [this].concat(args).map($A);
783
    return this.map(function(value, index) {
784
      return iterator(collections.pluck(index));
785
    });
786
  },
787
 
788
  size: function() {
789
    return this.toArray().length;
790
  },
791
 
792
  inspect: function() {
793
    return '#<Enumerable:' + this.toArray().inspect() + '>';
794
  }
795
};
796
 
797
Object.extend(Enumerable, {
798
  map:     Enumerable.collect,
799
  find:    Enumerable.detect,
800
  select:  Enumerable.findAll,
801
  filter:  Enumerable.findAll,
802
  member:  Enumerable.include,
803
  entries: Enumerable.toArray,
804
  every:   Enumerable.all,
805
  some:    Enumerable.any
806
});
807
function $A(iterable) {
808
  if (!iterable) return [];
809
  if (iterable.toArray) return iterable.toArray();
810
  var length = iterable.length || 0, results = new Array(length);
811
  while (length--) results[length] = iterable[length];
812
  return results;
813
}
814
 
815
if (Prototype.Browser.WebKit) {
816
  $A = function(iterable) {
817
    if (!iterable) return [];
818
    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
819
        iterable.toArray) return iterable.toArray();
820
    var length = iterable.length || 0, results = new Array(length);
821
    while (length--) results[length] = iterable[length];
822
    return results;
823
  };
824
}
825
 
826
Array.from = $A;
827
 
828
Object.extend(Array.prototype, Enumerable);
829
 
830
if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;
831
 
832
Object.extend(Array.prototype, {
833
  _each: function(iterator) {
834
    for (var i = 0, length = this.length; i < length; i++)
835
      iterator(this[i]);
836
  },
837
 
838
  clear: function() {
839
    this.length = 0;
840
    return this;
841
  },
842
 
843
  first: function() {
844
    return this[0];
845
  },
846
 
847
  last: function() {
848
    return this[this.length - 1];
849
  },
850
 
851
  compact: function() {
852
    return this.select(function(value) {
853
      return value != null;
854
    });
855
  },
856
 
857
  flatten: function() {
858
    return this.inject([], function(array, value) {
859
      return array.concat(Object.isArray(value) ?
860
        value.flatten() : [value]);
861
    });
862
  },
863
 
864
  without: function() {
865
    var values = $A(arguments);
866
    return this.select(function(value) {
867
      return !values.include(value);
868
    });
869
  },
870
 
871
  reverse: function(inline) {
872
    return (inline !== false ? this : this.toArray())._reverse();
873
  },
874
 
875
  reduce: function() {
876
    return this.length > 1 ? this : this[0];
877
  },
878
 
879
  uniq: function(sorted) {
880
    return this.inject([], function(array, value, index) {
881
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
882
        array.push(value);
883
      return array;
884
    });
885
  },
886
 
887
  intersect: function(array) {
888
    return this.uniq().findAll(function(item) {
889
      return array.detect(function(value) { return item === value });
890
    });
891
  },
892
 
893
  clone: function() {
894
    return [].concat(this);
895
  },
896
 
897
  size: function() {
898
    return this.length;
899
  },
900
 
901
  inspect: function() {
902
    return '[' + this.map(Object.inspect).join(', ') + ']';
903
  },
904
 
905
  toJSON: function() {
906
    var results = [];
907
    this.each(function(object) {
908
      var value = Object.toJSON(object);
909
      if (!Object.isUndefined(value)) results.push(value);
910
    });
911
    return '[' + results.join(', ') + ']';
912
  }
913
});
914
 
915
// use native browser JS 1.6 implementation if available
916
if (Object.isFunction(Array.prototype.forEach))
917
  Array.prototype._each = Array.prototype.forEach;
918
 
919
if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
920
  i || (i = 0);
921
  var length = this.length;
922
  if (i < 0) i = length + i;
923
  for (; i < length; i++)
924
    if (this[i] === item) return i;
925
  return -1;
926
};
927
 
928
if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
929
  i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
930
  var n = this.slice(0, i).reverse().indexOf(item);
931
  return (n < 0) ? n : i - n - 1;
932
};
933
 
934
Array.prototype.toArray = Array.prototype.clone;
935
 
936
function $w(string) {
937
  if (!Object.isString(string)) return [];
938
  string = string.strip();
939
  return string ? string.split(/\s+/) : [];
940
}
941
 
942
if (Prototype.Browser.Opera){
943
  Array.prototype.concat = function() {
944
    var array = [];
945
    for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
946
    for (var i = 0, length = arguments.length; i < length; i++) {
947
      if (Object.isArray(arguments[i])) {
948
        for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
949
          array.push(arguments[i][j]);
950
      } else {
951
        array.push(arguments[i]);
952
      }
953
    }
954
    return array;
955
  };
956
}
957
Object.extend(Number.prototype, {
958
  toColorPart: function() {
959
    return this.toPaddedString(2, 16);
960
  },
961
 
962
  succ: function() {
963
    return this + 1;
964
  },
965
 
966
  times: function(iterator) {
967
    $R(0, this, true).each(iterator);
968
    return this;
969
  },
970
 
971
  toPaddedString: function(length, radix) {
972
    var string = this.toString(radix || 10);
973
    return '0'.times(length - string.length) + string;
974
  },
975
 
976
  toJSON: function() {
977
    return isFinite(this) ? this.toString() : 'null';
978
  }
979
});
980
 
981
$w('abs round ceil floor').each(function(method){
982
  Number.prototype[method] = Math[method].methodize();
983
});
984
function $H(object) {
985
  return new Hash(object);
986
};
987
 
988
var Hash = Class.create(Enumerable, (function() {
989
 
990
  function toQueryPair(key, value) {
991
    if (Object.isUndefined(value)) return key;
992
    return key + '=' + encodeURIComponent(String.interpret(value));
993
  }
994
 
995
  return {
996
    initialize: function(object) {
997
      this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
998
    },
999
 
1000
    _each: function(iterator) {
1001
      for (var key in this._object) {
1002
        var value = this._object[key], pair = [key, value];
1003
        pair.key = key;
1004
        pair.value = value;
1005
        iterator(pair);
1006
      }
1007
    },
1008
 
1009
    set: function(key, value) {
1010
      return this._object[key] = value;
1011
    },
1012
 
1013
    get: function(key) {
1014
      return this._object[key];
1015
    },
1016
 
1017
    unset: function(key) {
1018
      var value = this._object[key];
1019
      delete this._object[key];
1020
      return value;
1021
    },
1022
 
1023
    toObject: function() {
1024
      return Object.clone(this._object);
1025
    },
1026
 
1027
    keys: function() {
1028
      return this.pluck('key');
1029
    },
1030
 
1031
    values: function() {
1032
      return this.pluck('value');
1033
    },
1034
 
1035
    index: function(value) {
1036
      var match = this.detect(function(pair) {
1037
        return pair.value === value;
1038
      });
1039
      return match && match.key;
1040
    },
1041
 
1042
    merge: function(object) {
1043
      return this.clone().update(object);
1044
    },
1045
 
1046
    update: function(object) {
1047
      return new Hash(object).inject(this, function(result, pair) {
1048
        result.set(pair.key, pair.value);
1049
        return result;
1050
      });
1051
    },
1052
 
1053
    toQueryString: function() {
1054
      return this.map(function(pair) {
1055
        var key = encodeURIComponent(pair.key), values = pair.value;
1056
 
1057
        if (values && typeof values == 'object') {
1058
          if (Object.isArray(values))
1059
            return values.map(toQueryPair.curry(key)).join('&');
1060
        }
1061
        return toQueryPair(key, values);
1062
      }).join('&');
1063
    },
1064
 
1065
    inspect: function() {
1066
      return '#<Hash:{' + this.map(function(pair) {
1067
        return pair.map(Object.inspect).join(': ');
1068
      }).join(', ') + '}>';
1069
    },
1070
 
1071
    toJSON: function() {
1072
      return Object.toJSON(this.toObject());
1073
    },
1074
 
1075
    clone: function() {
1076
      return new Hash(this);
1077
    }
1078
  }
1079
})());
1080
 
1081
Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
1082
Hash.from = $H;
1083
var ObjectRange = Class.create(Enumerable, {
1084
  initialize: function(start, end, exclusive) {
1085
    this.start = start;
1086
    this.end = end;
1087
    this.exclusive = exclusive;
1088
  },
1089
 
1090
  _each: function(iterator) {
1091
    var value = this.start;
1092
    while (this.include(value)) {
1093
      iterator(value);
1094
      value = value.succ();
1095
    }
1096
  },
1097
 
1098
  include: function(value) {
1099
    if (value < this.start)
1100
      return false;
1101
    if (this.exclusive)
1102
      return value < this.end;
1103
    return value <= this.end;
1104
  }
1105
});
1106
 
1107
var $R = function(start, end, exclusive) {
1108
  return new ObjectRange(start, end, exclusive);
1109
};
1110
 
1111
var Ajax = {
1112
  getTransport: function() {
1113
    return Try.these(
1114
      function() {return new XMLHttpRequest()},
1115
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
1116
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
1117
    ) || false;
1118
  },
1119
 
1120
  activeRequestCount: 0
1121
};
1122
 
1123
Ajax.Responders = {
1124
  responders: [],
1125
 
1126
  _each: function(iterator) {
1127
    this.responders._each(iterator);
1128
  },
1129
 
1130
  register: function(responder) {
1131
    if (!this.include(responder))
1132
      this.responders.push(responder);
1133
  },
1134
 
1135
  unregister: function(responder) {
1136
    this.responders = this.responders.without(responder);
1137
  },
1138
 
1139
  dispatch: function(callback, request, transport, json) {
1140
    this.each(function(responder) {
1141
      if (Object.isFunction(responder[callback])) {
1142
        try {
1143
          responder[callback].apply(responder, [request, transport, json]);
1144
        } catch (e) { }
1145
      }
1146
    });
1147
  }
1148
};
1149
 
1150
Object.extend(Ajax.Responders, Enumerable);
1151
 
1152
Ajax.Responders.register({
1153
  onCreate:   function() { Ajax.activeRequestCount++ },
1154
  onComplete: function() { Ajax.activeRequestCount-- }
1155
});
1156
 
1157
Ajax.Base = Class.create({
1158
  initialize: function(options) {
1159
    this.options = {
1160
      method:       'post',
1161
      asynchronous: true,
1162
      contentType:  'application/x-www-form-urlencoded',
1163
      encoding:     'UTF-8',
1164
      parameters:   '',
1165
      evalJSON:     true,
1166
      evalJS:       true
1167
    };
1168
    Object.extend(this.options, options || { });
1169
 
1170
    this.options.method = this.options.method.toLowerCase();
1171
 
1172
    if (Object.isString(this.options.parameters))
1173
      this.options.parameters = this.options.parameters.toQueryParams();
1174
    else if (Object.isHash(this.options.parameters))
1175
      this.options.parameters = this.options.parameters.toObject();
1176
  }
1177
});
1178
 
1179
Ajax.Request = Class.create(Ajax.Base, {
1180
  _complete: false,
1181
 
1182
  initialize: function($super, url, options) {
1183
    $super(options);
1184
    this.transport = Ajax.getTransport();
1185
    this.request(url);
1186
  },
1187
 
1188
  request: function(url) {
1189
    this.url = url;
1190
    this.method = this.options.method;
1191
    var params = Object.clone(this.options.parameters);
1192
 
1193
    if (!['get', 'post'].include(this.method)) {
1194
      // simulate other verbs over post
1195
      params['_method'] = this.method;
1196
      this.method = 'post';
1197
    }
1198
 
1199
    this.parameters = params;
1200
 
1201
    if (params = Object.toQueryString(params)) {
1202
      // when GET, append parameters to URL
1203
      if (this.method == 'get')
1204
        this.url += (this.url.include('?') ? '&' : '?') + params;
1205
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
1206
        params += '&_=';
1207
    }
1208
 
1209
    try {
1210
      var response = new Ajax.Response(this);
1211
      if (this.options.onCreate) this.options.onCreate(response);
1212
      Ajax.Responders.dispatch('onCreate', this, response);
1213
 
1214
      this.transport.open(this.method.toUpperCase(), this.url,
1215
        this.options.asynchronous);
1216
 
1217
      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);
1218
 
1219
      this.transport.onreadystatechange = this.onStateChange.bind(this);
1220
      this.setRequestHeaders();
1221
 
1222
      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
1223
      this.transport.send(this.body);
1224
 
1225
      /* Force Firefox to handle ready state 4 for synchronous requests */
1226
      if (!this.options.asynchronous && this.transport.overrideMimeType)
1227
        this.onStateChange();
1228
 
1229
    }
1230
    catch (e) {
1231
      this.dispatchException(e);
1232
    }
1233
  },
1234
 
1235
  onStateChange: function() {
1236
    var readyState = this.transport.readyState;
1237
    if (readyState > 1 && !((readyState == 4) && this._complete))
1238
      this.respondToReadyState(this.transport.readyState);
1239
  },
1240
 
1241
  setRequestHeaders: function() {
1242
    var headers = {
1243
      'X-Requested-With': 'XMLHttpRequest',
1244
      'X-Prototype-Version': Prototype.Version,
1245
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
1246
    };
1247
 
1248
    if (this.method == 'post') {
1249
      headers['Content-type'] = this.options.contentType +
1250
        (this.options.encoding ? '; charset=' + this.options.encoding : '');
1251
 
1252
      /* Force "Connection: close" for older Mozilla browsers to work
1253
       * around a bug where XMLHttpRequest sends an incorrect
1254
       * Content-length header. See Mozilla Bugzilla #246651.
1255
       */
1256
      if (this.transport.overrideMimeType &&
1257
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
1258
            headers['Connection'] = 'close';
1259
    }
1260
 
1261
    // user-defined headers
1262
    if (typeof this.options.requestHeaders == 'object') {
1263
      var extras = this.options.requestHeaders;
1264
 
1265
      if (Object.isFunction(extras.push))
1266
        for (var i = 0, length = extras.length; i < length; i += 2)
1267
          headers[extras[i]] = extras[i+1];
1268
      else
1269
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
1270
    }
1271
 
1272
    for (var name in headers)
1273
      this.transport.setRequestHeader(name, headers[name]);
1274
  },
1275
 
1276
  success: function() {
1277
    var status = this.getStatus();
1278
    return !status || (status >= 200 && status < 300);
1279
  },
1280
 
1281
  getStatus: function() {
1282
    try {
1283
      return this.transport.status || 0;
1284
    } catch (e) { return 0 }
1285
  },
1286
 
1287
  respondToReadyState: function(readyState) {
1288
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);
1289
 
1290
    if (state == 'Complete') {
1291
      try {
1292
        this._complete = true;
1293
        (this.options['on' + response.status]
1294
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
1295
         || Prototype.emptyFunction)(response, response.headerJSON);
1296
      } catch (e) {
1297
        this.dispatchException(e);
1298
      }
1299
 
1300
      var contentType = response.getHeader('Content-type');
1301
      if (this.options.evalJS == 'force'
1302
          || (this.options.evalJS && this.isSameOrigin() && contentType
1303
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
1304
        this.evalResponse();
1305
    }
1306
 
1307
    try {
1308
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
1309
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
1310
    } catch (e) {
1311
      this.dispatchException(e);
1312
    }
1313
 
1314
    if (state == 'Complete') {
1315
      // avoid memory leak in MSIE: clean up
1316
      this.transport.onreadystatechange = Prototype.emptyFunction;
1317
    }
1318
  },
1319
 
1320
  isSameOrigin: function() {
1321
    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
1322
    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
1323
      protocol: location.protocol,
1324
      domain: document.domain,
1325
      port: location.port ? ':' + location.port : ''
1326
    }));
1327
  },
1328
 
1329
  getHeader: function(name) {
1330
    try {
1331
      return this.transport.getResponseHeader(name) || null;
1332
    } catch (e) { return null }
1333
  },
1334
 
1335
  evalResponse: function() {
1336
    try {
1337
      return eval((this.transport.responseText || '').unfilterJSON());
1338
    } catch (e) {
1339
      this.dispatchException(e);
1340
    }
1341
  },
1342
 
1343
  dispatchException: function(exception) {
1344
    (this.options.onException || Prototype.emptyFunction)(this, exception);
1345
    Ajax.Responders.dispatch('onException', this, exception);
1346
  }
1347
});
1348
 
1349
Ajax.Request.Events =
1350
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
1351
 
1352
Ajax.Response = Class.create({
1353
  initialize: function(request){
1354
    this.request = request;
1355
    var transport  = this.transport  = request.transport,
1356
        readyState = this.readyState = transport.readyState;
1357
 
1358
    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
1359
      this.status       = this.getStatus();
1360
      this.statusText   = this.getStatusText();
1361
      this.responseText = String.interpret(transport.responseText);
1362
      this.headerJSON   = this._getHeaderJSON();
1363
    }
1364
 
1365
    if(readyState == 4) {
1366
      var xml = transport.responseXML;
1367
      this.responseXML  = Object.isUndefined(xml) ? null : xml;
1368
      this.responseJSON = this._getResponseJSON();
1369
    }
1370
  },
1371
 
1372
  status:      0,
1373
  statusText: '',
1374
 
1375
  getStatus: Ajax.Request.prototype.getStatus,
1376
 
1377
  getStatusText: function() {
1378
    try {
1379
      return this.transport.statusText || '';
1380
    } catch (e) { return '' }
1381
  },
1382
 
1383
  getHeader: Ajax.Request.prototype.getHeader,
1384
 
1385
  getAllHeaders: function() {
1386
    try {
1387
      return this.getAllResponseHeaders();
1388
    } catch (e) { return null }
1389
  },
1390
 
1391
  getResponseHeader: function(name) {
1392
    return this.transport.getResponseHeader(name);
1393
  },
1394
 
1395
  getAllResponseHeaders: function() {
1396
    return this.transport.getAllResponseHeaders();
1397
  },
1398
 
1399
  _getHeaderJSON: function() {
1400
    var json = this.getHeader('X-JSON');
1401
    if (!json) return null;
1402
    json = decodeURIComponent(escape(json));
1403
    try {
1404
      return json.evalJSON(this.request.options.sanitizeJSON ||
1405
        !this.request.isSameOrigin());
1406
    } catch (e) {
1407
      this.request.dispatchException(e);
1408
    }
1409
  },
1410
 
1411
  _getResponseJSON: function() {
1412
    var options = this.request.options;
1413
    if (!options.evalJSON || (options.evalJSON != 'force' &&
1414
      !(this.getHeader('Content-type') || '').include('application/json')) ||
1415
        this.responseText.blank())
1416
          return null;
1417
    try {
1418
      return this.responseText.evalJSON(options.sanitizeJSON ||
1419
        !this.request.isSameOrigin());
1420
    } catch (e) {
1421
      this.request.dispatchException(e);
1422
    }
1423
  }
1424
});
1425
 
1426
Ajax.Updater = Class.create(Ajax.Request, {
1427
  initialize: function($super, container, url, options) {
1428
    this.container = {
1429
      success: (container.success || container),
1430
      failure: (container.failure || (container.success ? null : container))
1431
    };
1432
 
1433
    options = Object.clone(options);
1434
    var onComplete = options.onComplete;
1435
    options.onComplete = (function(response, json) {
1436
      this.updateContent(response.responseText);
1437
      if (Object.isFunction(onComplete)) onComplete(response, json);
1438
    }).bind(this);
1439
 
1440
    $super(url, options);
1441
  },
1442
 
1443
  updateContent: function(responseText) {
1444
    var receiver = this.container[this.success() ? 'success' : 'failure'],
1445
        options = this.options;
1446
 
1447
    if (!options.evalScripts) responseText = responseText.stripScripts();
1448
 
1449
    if (receiver = $(receiver)) {
1450
      if (options.insertion) {
1451
        if (Object.isString(options.insertion)) {
1452
          var insertion = { }; insertion[options.insertion] = responseText;
1453
          receiver.insert(insertion);
1454
        }
1455
        else options.insertion(receiver, responseText);
1456
      }
1457
      else receiver.update(responseText);
1458
    }
1459
  }
1460
});
1461
 
1462
Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
1463
  initialize: function($super, container, url, options) {
1464
    $super(options);
1465
    this.onComplete = this.options.onComplete;
1466
 
1467
    this.frequency = (this.options.frequency || 2);
1468
    this.decay = (this.options.decay || 1);
1469
 
1470
    this.updater = { };
1471
    this.container = container;
1472
    this.url = url;
1473
 
1474
    this.start();
1475
  },
1476
 
1477
  start: function() {
1478
    this.options.onComplete = this.updateComplete.bind(this);
1479
    this.onTimerEvent();
1480
  },
1481
 
1482
  stop: function() {
1483
    this.updater.options.onComplete = undefined;
1484
    clearTimeout(this.timer);
1485
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
1486
  },
1487
 
1488
  updateComplete: function(response) {
1489
    if (this.options.decay) {
1490
      this.decay = (response.responseText == this.lastText ?
1491
        this.decay * this.options.decay : 1);
1492
 
1493
      this.lastText = response.responseText;
1494
    }
1495
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
1496
  },
1497
 
1498
  onTimerEvent: function() {
1499
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
1500
  }
1501
});
1502
function $(element) {
1503
  if (arguments.length > 1) {
1504
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
1505
      elements.push($(arguments[i]));
1506
    return elements;
1507
  }
1508
  if (Object.isString(element))
1509
    element = document.getElementById(element);
1510
  return Element.extend(element);
1511
}
1512
 
1513
if (Prototype.BrowserFeatures.XPath) {
1514
  document._getElementsByXPath = function(expression, parentElement) {
1515
    var results = [];
1516
    var query = document.evaluate(expression, $(parentElement) || document,
1517
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
1518
    for (var i = 0, length = query.snapshotLength; i < length; i++)
1519
      results.push(Element.extend(query.snapshotItem(i)));
1520
    return results;
1521
  };
1522
}
1523
 
1524
/*--------------------------------------------------------------------------*/
1525
 
1526
if (!window.Node) var Node = { };
1527
 
1528
if (!Node.ELEMENT_NODE) {
1529
  // DOM level 2 ECMAScript Language Binding
1530
  Object.extend(Node, {
1531
    ELEMENT_NODE: 1,
1532
    ATTRIBUTE_NODE: 2,
1533
    TEXT_NODE: 3,
1534
    CDATA_SECTION_NODE: 4,
1535
    ENTITY_REFERENCE_NODE: 5,
1536
    ENTITY_NODE: 6,
1537
    PROCESSING_INSTRUCTION_NODE: 7,
1538
    COMMENT_NODE: 8,
1539
    DOCUMENT_NODE: 9,
1540
    DOCUMENT_TYPE_NODE: 10,
1541
    DOCUMENT_FRAGMENT_NODE: 11,
1542
    NOTATION_NODE: 12
1543
  });
1544
}
1545
 
1546
(function() {
1547
  var element = this.Element;
1548
  this.Element = function(tagName, attributes) {
1549
    attributes = attributes || { };
1550
    tagName = tagName.toLowerCase();
1551
    var cache = Element.cache;
1552
    if (Prototype.Browser.IE && attributes.name) {
1553
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
1554
      delete attributes.name;
1555
      return Element.writeAttribute(document.createElement(tagName), attributes);
1556
    }
1557
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
1558
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
1559
  };
1560
  Object.extend(this.Element, element || { });
1561
}).call(window);
1562
 
1563
Element.cache = { };
1564
 
1565
Element.Methods = {
1566
  visible: function(element) {
1567
    return $(element).style.display != 'none';
1568
  },
1569
 
1570
  toggle: function(element) {
1571
    element = $(element);
1572
    Element[Element.visible(element) ? 'hide' : 'show'](element);
1573
    return element;
1574
  },
1575
 
1576
  hide: function(element) {
1577
    $(element).style.display = 'none';
1578
    return element;
1579
  },
1580
 
1581
  show: function(element) {
1582
    $(element).style.display = '';
1583
    return element;
1584
  },
1585
 
1586
  remove: function(element) {
1587
    element = $(element);
1588
    element.parentNode.removeChild(element);
1589
    return element;
1590
  },
1591
 
1592
  update: function(element, content) {
1593
    element = $(element);
1594
    if (content && content.toElement) content = content.toElement();
1595
    if (Object.isElement(content)) return element.update().insert(content);
1596
    content = Object.toHTML(content);
1597
    element.innerHTML = content.stripScripts();
1598
    content.evalScripts.bind(content).defer();
1599
    return element;
1600
  },
1601
 
1602
  replace: function(element, content) {
1603
    element = $(element);
1604
    if (content && content.toElement) content = content.toElement();
1605
    else if (!Object.isElement(content)) {
1606
      content = Object.toHTML(content);
1607
      var range = element.ownerDocument.createRange();
1608
      range.selectNode(element);
1609
      content.evalScripts.bind(content).defer();
1610
      content = range.createContextualFragment(content.stripScripts());
1611
    }
1612
    element.parentNode.replaceChild(content, element);
1613
    return element;
1614
  },
1615
 
1616
  insert: function(element, insertions) {
1617
    element = $(element);
1618
 
1619
    if (Object.isString(insertions) || Object.isNumber(insertions) ||
1620
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
1621
          insertions = {bottom:insertions};
1622
 
1623
    var content, insert, tagName, childNodes;
1624
 
1625
    for (var position in insertions) {
1626
      content  = insertions[position];
1627
      position = position.toLowerCase();
1628
      insert = Element._insertionTranslations[position];
1629
 
1630
      if (content && content.toElement) content = content.toElement();
1631
      if (Object.isElement(content)) {
1632
        insert(element, content);
1633
        continue;
1634
      }
1635
 
1636
      content = Object.toHTML(content);
1637
 
1638
      tagName = ((position == 'before' || position == 'after')
1639
        ? element.parentNode : element).tagName.toUpperCase();
1640
 
1641
      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
1642
 
1643
      if (position == 'top' || position == 'after') childNodes.reverse();
1644
      childNodes.each(insert.curry(element));
1645
 
1646
      content.evalScripts.bind(content).defer();
1647
    }
1648
 
1649
    return element;
1650
  },
1651
 
1652
  wrap: function(element, wrapper, attributes) {
1653
    element = $(element);
1654
    if (Object.isElement(wrapper))
1655
      $(wrapper).writeAttribute(attributes || { });
1656
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
1657
    else wrapper = new Element('div', wrapper);
1658
    if (element.parentNode)
1659
      element.parentNode.replaceChild(wrapper, element);
1660
    wrapper.appendChild(element);
1661
    return wrapper;
1662
  },
1663
 
1664
  inspect: function(element) {
1665
    element = $(element);
1666
    var result = '<' + element.tagName.toLowerCase();
1667
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
1668
      var property = pair.first(), attribute = pair.last();
1669
      var value = (element[property] || '').toString();
1670
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
1671
    });
1672
    return result + '>';
1673
  },
1674
 
1675
  recursivelyCollect: function(element, property) {
1676
    element = $(element);
1677
    var elements = [];
1678
    while (element = element[property])
1679
      if (element.nodeType == 1)
1680
        elements.push(Element.extend(element));
1681
    return elements;
1682
  },
1683
 
1684
  ancestors: function(element) {
1685
    return $(element).recursivelyCollect('parentNode');
1686
  },
1687
 
1688
  descendants: function(element) {
1689
    return $(element).select("*");
1690
  },
1691
 
1692
  firstDescendant: function(element) {
1693
    element = $(element).firstChild;
1694
    while (element && element.nodeType != 1) element = element.nextSibling;
1695
    return $(element);
1696
  },
1697
 
1698
  immediateDescendants: function(element) {
1699
    if (!(element = $(element).firstChild)) return [];
1700
    while (element && element.nodeType != 1) element = element.nextSibling;
1701
    if (element) return [element].concat($(element).nextSiblings());
1702
    return [];
1703
  },
1704
 
1705
  previousSiblings: function(element) {
1706
    return $(element).recursivelyCollect('previousSibling');
1707
  },
1708
 
1709
  nextSiblings: function(element) {
1710
    return $(element).recursivelyCollect('nextSibling');
1711
  },
1712
 
1713
  siblings: function(element) {
1714
    element = $(element);
1715
    return element.previousSiblings().reverse().concat(element.nextSiblings());
1716
  },
1717
 
1718
  match: function(element, selector) {
1719
    if (Object.isString(selector))
1720
      selector = new Selector(selector);
1721
    return selector.match($(element));
1722
  },
1723
 
1724
  up: function(element, expression, index) {
1725
    element = $(element);
1726
    if (arguments.length == 1) return $(element.parentNode);
1727
    var ancestors = element.ancestors();
1728
    return Object.isNumber(expression) ? ancestors[expression] :
1729
      Selector.findElement(ancestors, expression, index);
1730
  },
1731
 
1732
  down: function(element, expression, index) {
1733
    element = $(element);
1734
    if (arguments.length == 1) return element.firstDescendant();
1735
    return Object.isNumber(expression) ? element.descendants()[expression] :
1736
      element.select(expression)[index || 0];
1737
  },
1738
 
1739
  previous: function(element, expression, index) {
1740
    element = $(element);
1741
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
1742
    var previousSiblings = element.previousSiblings();
1743
    return Object.isNumber(expression) ? previousSiblings[expression] :
1744
      Selector.findElement(previousSiblings, expression, index);
1745
  },
1746
 
1747
  next: function(element, expression, index) {
1748
    element = $(element);
1749
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
1750
    var nextSiblings = element.nextSiblings();
1751
    return Object.isNumber(expression) ? nextSiblings[expression] :
1752
      Selector.findElement(nextSiblings, expression, index);
1753
  },
1754
 
1755
  select: function() {
1756
    var args = $A(arguments), element = $(args.shift());
1757
    return Selector.findChildElements(element, args);
1758
  },
1759
 
1760
  adjacent: function() {
1761
    var args = $A(arguments), element = $(args.shift());
1762
    return Selector.findChildElements(element.parentNode, args).without(element);
1763
  },
1764
 
1765
  identify: function(element) {
1766
    element = $(element);
1767
    var id = element.readAttribute('id'), self = arguments.callee;
1768
    if (id) return id;
1769
    do { id = 'anonymous_element_' + self.counter++ } while ($(id));
1770
    element.writeAttribute('id', id);
1771
    return id;
1772
  },
1773
 
1774
  readAttribute: function(element, name) {
1775
    element = $(element);
1776
    if (Prototype.Browser.IE) {
1777
      var t = Element._attributeTranslations.read;
1778
      if (t.values[name]) return t.values[name](element, name);
1779
      if (t.names[name]) name = t.names[name];
1780
      if (name.include(':')) {
1781
        return (!element.attributes || !element.attributes[name]) ? null :
1782
         element.attributes[name].value;
1783
      }
1784
    }
1785
    return element.getAttribute(name);
1786
  },
1787
 
1788
  writeAttribute: function(element, name, value) {
1789
    element = $(element);
1790
    var attributes = { }, t = Element._attributeTranslations.write;
1791
 
1792
    if (typeof name == 'object') attributes = name;
1793
    else attributes[name] = Object.isUndefined(value) ? true : value;
1794
 
1795
    for (var attr in attributes) {
1796
      name = t.names[attr] || attr;
1797
      value = attributes[attr];
1798
      if (t.values[attr]) name = t.values[attr](element, value);
1799
      if (value === false || value === null)
1800
        element.removeAttribute(name);
1801
      else if (value === true)
1802
        element.setAttribute(name, name);
1803
      else element.setAttribute(name, value);
1804
    }
1805
    return element;
1806
  },
1807
 
1808
  getHeight: function(element) {
1809
    return $(element).getDimensions().height;
1810
  },
1811
 
1812
  getWidth: function(element) {
1813
    return $(element).getDimensions().width;
1814
  },
1815
 
1816
  classNames: function(element) {
1817
    return new Element.ClassNames(element);
1818
  },
1819
 
1820
  hasClassName: function(element, className) {
1821
    if (!(element = $(element))) return;
1822
    var elementClassName = element.className;
1823
    return (elementClassName.length > 0 && (elementClassName == className ||
1824
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
1825
  },
1826
 
1827
  addClassName: function(element, className) {
1828
    if (!(element = $(element))) return;
1829
    if (!element.hasClassName(className))
1830
      element.className += (element.className ? ' ' : '') + className;
1831
    return element;
1832
  },
1833
 
1834
  removeClassName: function(element, className) {
1835
    if (!(element = $(element))) return;
1836
    element.className = element.className.replace(
1837
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
1838
    return element;
1839
  },
1840
 
1841
  toggleClassName: function(element, className) {
1842
    if (!(element = $(element))) return;
1843
    return element[element.hasClassName(className) ?
1844
      'removeClassName' : 'addClassName'](className);
1845
  },
1846
 
1847
  // removes whitespace-only text node children
1848
  cleanWhitespace: function(element) {
1849
    element = $(element);
1850
    var node = element.firstChild;
1851
    while (node) {
1852
      var nextNode = node.nextSibling;
1853
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
1854
        element.removeChild(node);
1855
      node = nextNode;
1856
    }
1857
    return element;
1858
  },
1859
 
1860
  empty: function(element) {
1861
    return $(element).innerHTML.blank();
1862
  },
1863
 
1864
  descendantOf: function(element, ancestor) {
1865
    element = $(element), ancestor = $(ancestor);
1866
    var originalAncestor = ancestor;
1867
 
1868
    if (element.compareDocumentPosition)
1869
      return (element.compareDocumentPosition(ancestor) & 8) === 8;
1870
 
1871
    if (element.sourceIndex && !Prototype.Browser.Opera) {
1872
      var e = element.sourceIndex, a = ancestor.sourceIndex,
1873
       nextAncestor = ancestor.nextSibling;
1874
      if (!nextAncestor) {
1875
        do { ancestor = ancestor.parentNode; }
1876
        while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode);
1877
      }
1878
      if (nextAncestor && nextAncestor.sourceIndex)
1879
       return (e > a && e < nextAncestor.sourceIndex);
1880
    }
1881
 
1882
    while (element = element.parentNode)
1883
      if (element == originalAncestor) return true;
1884
    return false;
1885
  },
1886
 
1887
  scrollTo: function(element) {
1888
    element = $(element);
1889
    var pos = element.cumulativeOffset();
1890
    window.scrollTo(pos[0], pos[1]);
1891
    return element;
1892
  },
1893
 
1894
  getStyle: function(element, style) {
1895
    element = $(element);
1896
    style = style == 'float' ? 'cssFloat' : style.camelize();
1897
    var value = element.style[style];
1898
    if (!value) {
1899
      var css = document.defaultView.getComputedStyle(element, null);
1900
      value = css ? css[style] : null;
1901
    }
1902
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
1903
    return value == 'auto' ? null : value;
1904
  },
1905
 
1906
  getOpacity: function(element) {
1907
    return $(element).getStyle('opacity');
1908
  },
1909
 
1910
  setStyle: function(element, styles) {
1911
    element = $(element);
1912
    var elementStyle = element.style, match;
1913
    if (Object.isString(styles)) {
1914
      element.style.cssText += ';' + styles;
1915
      return styles.include('opacity') ?
1916
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
1917
    }
1918
    for (var property in styles)
1919
      if (property == 'opacity') element.setOpacity(styles[property]);
1920
      else
1921
        elementStyle[(property == 'float' || property == 'cssFloat') ?
1922
          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
1923
            property] = styles[property];
1924
 
1925
    return element;
1926
  },
1927
 
1928
  setOpacity: function(element, value) {
1929
    element = $(element);
1930
    element.style.opacity = (value == 1 || value === '') ? '' :
1931
      (value < 0.00001) ? 0 : value;
1932
    return element;
1933
  },
1934
 
1935
  getDimensions: function(element) {
1936
    element = $(element);
1937
    var display = $(element).getStyle('display');
1938
    if (display != 'none' && display != null) // Safari bug
1939
      return {width: element.offsetWidth, height: element.offsetHeight};
1940
 
1941
    // All *Width and *Height properties give 0 on elements with display none,
1942
    // so enable the element temporarily
1943
    var els = element.style;
1944
    var originalVisibility = els.visibility;
1945
    var originalPosition = els.position;
1946
    var originalDisplay = els.display;
1947
    els.visibility = 'hidden';
1948
    els.position = 'absolute';
1949
    els.display = 'block';
1950
    var originalWidth = element.clientWidth;
1951
    var originalHeight = element.clientHeight;
1952
    els.display = originalDisplay;
1953
    els.position = originalPosition;
1954
    els.visibility = originalVisibility;
1955
    return {width: originalWidth, height: originalHeight};
1956
  },
1957
 
1958
  makePositioned: function(element) {
1959
    element = $(element);
1960
    var pos = Element.getStyle(element, 'position');
1961
    if (pos == 'static' || !pos) {
1962
      element._madePositioned = true;
1963
      element.style.position = 'relative';
1964
      // Opera returns the offset relative to the positioning context, when an
1965
      // element is position relative but top and left have not been defined
1966
      if (window.opera) {
1967
        element.style.top = 0;
1968
        element.style.left = 0;
1969
      }
1970
    }
1971
    return element;
1972
  },
1973
 
1974
  undoPositioned: function(element) {
1975
    element = $(element);
1976
    if (element._madePositioned) {
1977
      element._madePositioned = undefined;
1978
      element.style.position =
1979
        element.style.top =
1980
        element.style.left =
1981
        element.style.bottom =
1982
        element.style.right = '';
1983
    }
1984
    return element;
1985
  },
1986
 
1987
  makeClipping: function(element) {
1988
    element = $(element);
1989
    if (element._overflow) return element;
1990
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
1991
    if (element._overflow !== 'hidden')
1992
      element.style.overflow = 'hidden';
1993
    return element;
1994
  },
1995
 
1996
  undoClipping: function(element) {
1997
    element = $(element);
1998
    if (!element._overflow) return element;
1999
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
2000
    element._overflow = null;
2001
    return element;
2002
  },
2003
 
2004
  cumulativeOffset: function(element) {
2005
    var valueT = 0, valueL = 0;
2006
    do {
2007
      valueT += element.offsetTop  || 0;
2008
      valueL += element.offsetLeft || 0;
2009
      element = element.offsetParent;
2010
    } while (element);
2011
    return Element._returnOffset(valueL, valueT);
2012
  },
2013
 
2014
  positionedOffset: function(element) {
2015
    var valueT = 0, valueL = 0;
2016
    do {
2017
      valueT += element.offsetTop  || 0;
2018
      valueL += element.offsetLeft || 0;
2019
      element = element.offsetParent;
2020
      if (element) {
2021
        if (element.tagName == 'BODY') break;
2022
        var p = Element.getStyle(element, 'position');
2023
        if (p !== 'static') break;
2024
      }
2025
    } while (element);
2026
    return Element._returnOffset(valueL, valueT);
2027
  },
2028
 
2029
  absolutize: function(element) {
2030
    element = $(element);
2031
    if (element.getStyle('position') == 'absolute') return;
2032
    // Position.prepare(); // To be done manually by Scripty when it needs it.
2033
 
2034
    var offsets = element.positionedOffset();
2035
    var top     = offsets[1];
2036
    var left    = offsets[0];
2037
    var width   = element.clientWidth;
2038
    var height  = element.clientHeight;
2039
 
2040
    element._originalLeft   = left - parseFloat(element.style.left  || 0);
2041
    element._originalTop    = top  - parseFloat(element.style.top || 0);
2042
    element._originalWidth  = element.style.width;
2043
    element._originalHeight = element.style.height;
2044
 
2045
    element.style.position = 'absolute';
2046
    element.style.top    = top + 'px';
2047
    element.style.left   = left + 'px';
2048
    element.style.width  = width + 'px';
2049
    element.style.height = height + 'px';
2050
    return element;
2051
  },
2052
 
2053
  relativize: function(element) {
2054
    element = $(element);
2055
    if (element.getStyle('position') == 'relative') return;
2056
    // Position.prepare(); // To be done manually by Scripty when it needs it.
2057
 
2058
    element.style.position = 'relative';
2059
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
2060
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
2061
 
2062
    element.style.top    = top + 'px';
2063
    element.style.left   = left + 'px';
2064
    element.style.height = element._originalHeight;
2065
    element.style.width  = element._originalWidth;
2066
    return element;
2067
  },
2068
 
2069
  cumulativeScrollOffset: function(element) {
2070
    var valueT = 0, valueL = 0;
2071
    do {
2072
      valueT += element.scrollTop  || 0;
2073
      valueL += element.scrollLeft || 0;
2074
      element = element.parentNode;
2075
    } while (element);
2076
    return Element._returnOffset(valueL, valueT);
2077
  },
2078
 
2079
  getOffsetParent: function(element) {
2080
    if (element.offsetParent) return $(element.offsetParent);
2081
    if (element == document.body) return $(element);
2082
 
2083
    while ((element = element.parentNode) && element != document.body)
2084
      if (Element.getStyle(element, 'position') != 'static')
2085
        return $(element);
2086
 
2087
    return $(document.body);
2088
  },
2089
 
2090
  viewportOffset: function(forElement) {
2091
    var valueT = 0, valueL = 0;
2092
 
2093
    var element = forElement;
2094
    do {
2095
      valueT += element.offsetTop  || 0;
2096
      valueL += element.offsetLeft || 0;
2097
 
2098
      // Safari fix
2099
      if (element.offsetParent == document.body &&
2100
        Element.getStyle(element, 'position') == 'absolute') break;
2101
 
2102
    } while (element = element.offsetParent);
2103
 
2104
    element = forElement;
2105
    do {
2106
      if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
2107
        valueT -= element.scrollTop  || 0;
2108
        valueL -= element.scrollLeft || 0;
2109
      }
2110
    } while (element = element.parentNode);
2111
 
2112
    return Element._returnOffset(valueL, valueT);
2113
  },
2114
 
2115
  clonePosition: function(element, source) {
2116
    var options = Object.extend({
2117
      setLeft:    true,
2118
      setTop:     true,
2119
      setWidth:   true,
2120
      setHeight:  true,
2121
      offsetTop:  0,
2122
      offsetLeft: 0
2123
    }, arguments[2] || { });
2124
 
2125
    // find page position of source
2126
    source = $(source);
2127
    var p = source.viewportOffset();
2128
 
2129
    // find coordinate system to use
2130
    element = $(element);
2131
    var delta = [0, 0];
2132
    var parent = null;
2133
    // delta [0,0] will do fine with position: fixed elements,
2134
    // position:absolute needs offsetParent deltas
2135
    if (Element.getStyle(element, 'position') == 'absolute') {
2136
      parent = element.getOffsetParent();
2137
      delta = parent.viewportOffset();
2138
    }
2139
 
2140
    // correct by body offsets (fixes Safari)
2141
    if (parent == document.body) {
2142
      delta[0] -= document.body.offsetLeft;
2143
      delta[1] -= document.body.offsetTop;
2144
    }
2145
 
2146
    // set position
2147
    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
2148
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
2149
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
2150
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
2151
    return element;
2152
  }
2153
};
2154
 
2155
Element.Methods.identify.counter = 1;
2156
 
2157
Object.extend(Element.Methods, {
2158
  getElementsBySelector: Element.Methods.select,
2159
  childElements: Element.Methods.immediateDescendants
2160
});
2161
 
2162
Element._attributeTranslations = {
2163
  write: {
2164
    names: {
2165
      className: 'class',
2166
      htmlFor:   'for'
2167
    },
2168
    values: { }
2169
  }
2170
};
2171
 
2172
if (Prototype.Browser.Opera) {
2173
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
2174
    function(proceed, element, style) {
2175
      switch (style) {
2176
        case 'left': case 'top': case 'right': case 'bottom':
2177
          if (proceed(element, 'position') === 'static') return null;
2178
        case 'height': case 'width':
2179
          // returns '0px' for hidden elements; we want it to return null
2180
          if (!Element.visible(element)) return null;
2181
 
2182
          // returns the border-box dimensions rather than the content-box
2183
          // dimensions, so we subtract padding and borders from the value
2184
          var dim = parseInt(proceed(element, style), 10);
2185
 
2186
          if (dim !== element['offset' + style.capitalize()])
2187
            return dim + 'px';
2188
 
2189
          var properties;
2190
          if (style === 'height') {
2191
            properties = ['border-top-width', 'padding-top',
2192
             'padding-bottom', 'border-bottom-width'];
2193
          }
2194
          else {
2195
            properties = ['border-left-width', 'padding-left',
2196
             'padding-right', 'border-right-width'];
2197
          }
2198
          return properties.inject(dim, function(memo, property) {
2199
            var val = proceed(element, property);
2200
            return val === null ? memo : memo - parseInt(val, 10);
2201
          }) + 'px';
2202
        default: return proceed(element, style);
2203
      }
2204
    }
2205
  );
2206
 
2207
  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
2208
    function(proceed, element, attribute) {
2209
      if (attribute === 'title') return element.title;
2210
      return proceed(element, attribute);
2211
    }
2212
  );
2213
}
2214
 
2215
else if (Prototype.Browser.IE) {
2216
  // IE doesn't report offsets correctly for static elements, so we change them
2217
  // to "relative" to get the values, then change them back.
2218
  Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
2219
    function(proceed, element) {
2220
      element = $(element);
2221
      var position = element.getStyle('position');
2222
      if (position !== 'static') return proceed(element);
2223
      element.setStyle({ position: 'relative' });
2224
      var value = proceed(element);
2225
      element.setStyle({ position: position });
2226
      return value;
2227
    }
2228
  );
2229
 
2230
  $w('positionedOffset viewportOffset').each(function(method) {
2231
    Element.Methods[method] = Element.Methods[method].wrap(
2232
      function(proceed, element) {
2233
        element = $(element);
2234
        var position = element.getStyle('position');
2235
        if (position !== 'static') return proceed(element);
2236
        // Trigger hasLayout on the offset parent so that IE6 reports
2237
        // accurate offsetTop and offsetLeft values for position: fixed.
2238
        var offsetParent = element.getOffsetParent();
2239
        if (offsetParent && offsetParent.getStyle('position') === 'fixed')
2240
          offsetParent.setStyle({ zoom: 1 });
2241
        element.setStyle({ position: 'relative' });
2242
        var value = proceed(element);
2243
        element.setStyle({ position: position });
2244
        return value;
2245
      }
2246
    );
2247
  });
2248
 
2249
  Element.Methods.getStyle = function(element, style) {
2250
    element = $(element);
2251
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
2252
    var value = element.style[style];
2253
    if (!value && element.currentStyle) value = element.currentStyle[style];
2254
 
2255
    if (style == 'opacity') {
2256
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
2257
        if (value[1]) return parseFloat(value[1]) / 100;
2258
      return 1.0;
2259
    }
2260
 
2261
    if (value == 'auto') {
2262
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
2263
        return element['offset' + style.capitalize()] + 'px';
2264
      return null;
2265
    }
2266
    return value;
2267
  };
2268
 
2269
  Element.Methods.setOpacity = function(element, value) {
2270
    function stripAlpha(filter){
2271
      return filter.replace(/alpha\([^\)]*\)/gi,'');
2272
    }
2273
    element = $(element);
2274
    var currentStyle = element.currentStyle;
2275
    if ((currentStyle && !currentStyle.hasLayout) ||
2276
      (!currentStyle && element.style.zoom == 'normal'))
2277
        element.style.zoom = 1;
2278
 
2279
    var filter = element.getStyle('filter'), style = element.style;
2280
    if (value == 1 || value === '') {
2281
      (filter = stripAlpha(filter)) ?
2282
        style.filter = filter : style.removeAttribute('filter');
2283
      return element;
2284
    } else if (value < 0.00001) value = 0;
2285
    style.filter = stripAlpha(filter) +
2286
      'alpha(opacity=' + (value * 100) + ')';
2287
    return element;
2288
  };
2289
 
2290
  Element._attributeTranslations = {
2291
    read: {
2292
      names: {
2293
        'class': 'className',
2294
        'for':   'htmlFor'
2295
      },
2296
      values: {
2297
        _getAttr: function(element, attribute) {
2298
          return element.getAttribute(attribute, 2);
2299
        },
2300
        _getAttrNode: function(element, attribute) {
2301
          var node = element.getAttributeNode(attribute);
2302
          return node ? node.value : "";
2303
        },
2304
        _getEv: function(element, attribute) {
2305
          attribute = element.getAttribute(attribute);
2306
          return attribute ? attribute.toString().slice(23, -2) : null;
2307
        },
2308
        _flag: function(element, attribute) {
2309
          return $(element).hasAttribute(attribute) ? attribute : null;
2310
        },
2311
        style: function(element) {
2312
          return element.style.cssText.toLowerCase();
2313
        },
2314
        title: function(element) {
2315
          return element.title;
2316
        }
2317
      }
2318
    }
2319
  };
2320
 
2321
  Element._attributeTranslations.write = {
2322
    names: Object.extend({
2323
      cellpadding: 'cellPadding',
2324
      cellspacing: 'cellSpacing'
2325
    }, Element._attributeTranslations.read.names),
2326
    values: {
2327
      checked: function(element, value) {
2328
        element.checked = !!value;
2329
      },
2330
 
2331
      style: function(element, value) {
2332
        element.style.cssText = value ? value : '';
2333
      }
2334
    }
2335
  };
2336
 
2337
  Element._attributeTranslations.has = {};
2338
 
2339
  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
2340
      'encType maxLength readOnly longDesc').each(function(attr) {
2341
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
2342
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
2343
  });
2344
 
2345
  (function(v) {
2346
    Object.extend(v, {
2347
      href:        v._getAttr,
2348
      src:         v._getAttr,
2349
      type:        v._getAttr,
2350
      action:      v._getAttrNode,
2351
      disabled:    v._flag,
2352
      checked:     v._flag,
2353
      readonly:    v._flag,
2354
      multiple:    v._flag,
2355
      onload:      v._getEv,
2356
      onunload:    v._getEv,
2357
      onclick:     v._getEv,
2358
      ondblclick:  v._getEv,
2359
      onmousedown: v._getEv,
2360
      onmouseup:   v._getEv,
2361
      onmouseover: v._getEv,
2362
      onmousemove: v._getEv,
2363
      onmouseout:  v._getEv,
2364
      onfocus:     v._getEv,
2365
      onblur:      v._getEv,
2366
      onkeypress:  v._getEv,
2367
      onkeydown:   v._getEv,
2368
      onkeyup:     v._getEv,
2369
      onsubmit:    v._getEv,
2370
      onreset:     v._getEv,
2371
      onselect:    v._getEv,
2372
      onchange:    v._getEv
2373
    });
2374
  })(Element._attributeTranslations.read.values);
2375
}
2376
 
2377
else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
2378
  Element.Methods.setOpacity = function(element, value) {
2379
    element = $(element);
2380
    element.style.opacity = (value == 1) ? 0.999999 :
2381
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
2382
    return element;
2383
  };
2384
}
2385
 
2386
else if (Prototype.Browser.WebKit) {
2387
  Element.Methods.setOpacity = function(element, value) {
2388
    element = $(element);
2389
    element.style.opacity = (value == 1 || value === '') ? '' :
2390
      (value < 0.00001) ? 0 : value;
2391
 
2392
    if (value == 1)
2393
      if(element.tagName == 'IMG' && element.width) {
2394
        element.width++; element.width--;
2395
      } else try {
2396
        var n = document.createTextNode(' ');
2397
        element.appendChild(n);
2398
        element.removeChild(n);
2399
      } catch (e) { }
2400
 
2401
    return element;
2402
  };
2403
 
2404
  // Safari returns margins on body which is incorrect if the child is absolutely
2405
  // positioned.  For performance reasons, redefine Element#cumulativeOffset for
2406
  // KHTML/WebKit only.
2407
  Element.Methods.cumulativeOffset = function(element) {
2408
    var valueT = 0, valueL = 0;
2409
    do {
2410
      valueT += element.offsetTop  || 0;
2411
      valueL += element.offsetLeft || 0;
2412
      if (element.offsetParent == document.body)
2413
        if (Element.getStyle(element, 'position') == 'absolute') break;
2414
 
2415
      element = element.offsetParent;
2416
    } while (element);
2417
 
2418
    return Element._returnOffset(valueL, valueT);
2419
  };
2420
}
2421
 
2422
if (Prototype.Browser.IE || Prototype.Browser.Opera) {
2423
  // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
2424
  Element.Methods.update = function(element, content) {
2425
    element = $(element);
2426
 
2427
    if (content && content.toElement) content = content.toElement();
2428
    if (Object.isElement(content)) return element.update().insert(content);
2429
 
2430
    content = Object.toHTML(content);
2431
    var tagName = element.tagName.toUpperCase();
2432
 
2433
    if (tagName in Element._insertionTranslations.tags) {
2434
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
2435
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
2436
        .each(function(node) { element.appendChild(node) });
2437
    }
2438
    else element.innerHTML = content.stripScripts();
2439
 
2440
    content.evalScripts.bind(content).defer();
2441
    return element;
2442
  };
2443
}
2444
 
2445
if ('outerHTML' in document.createElement('div')) {
2446
  Element.Methods.replace = function(element, content) {
2447
    element = $(element);
2448
 
2449
    if (content && content.toElement) content = content.toElement();
2450
    if (Object.isElement(content)) {
2451
      element.parentNode.replaceChild(content, element);
2452
      return element;
2453
    }
2454
 
2455
    content = Object.toHTML(content);
2456
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
2457
 
2458
    if (Element._insertionTranslations.tags[tagName]) {
2459
      var nextSibling = element.next();
2460
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
2461
      parent.removeChild(element);
2462
      if (nextSibling)
2463
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
2464
      else
2465
        fragments.each(function(node) { parent.appendChild(node) });
2466
    }
2467
    else element.outerHTML = content.stripScripts();
2468
 
2469
    content.evalScripts.bind(content).defer();
2470
    return element;
2471
  };
2472
}
2473
 
2474
Element._returnOffset = function(l, t) {
2475
  var result = [l, t];
2476
  result.left = l;
2477
  result.top = t;
2478
  return result;
2479
};
2480
 
2481
Element._getContentFromAnonymousElement = function(tagName, html) {
2482
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
2483
  if (t) {
2484
    div.innerHTML = t[0] + html + t[1];
2485
    t[2].times(function() { div = div.firstChild });
2486
  } else div.innerHTML = html;
2487
  return $A(div.childNodes);
2488
};
2489
 
2490
Element._insertionTranslations = {
2491
  before: function(element, node) {
2492
    element.parentNode.insertBefore(node, element);
2493
  },
2494
  top: function(element, node) {
2495
    element.insertBefore(node, element.firstChild);
2496
  },
2497
  bottom: function(element, node) {
2498
    element.appendChild(node);
2499
  },
2500
  after: function(element, node) {
2501
    element.parentNode.insertBefore(node, element.nextSibling);
2502
  },
2503
  tags: {
2504
    TABLE:  ['<table>',                '</table>',                   1],
2505
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
2506
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
2507
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
2508
    SELECT: ['<select>',               '</select>',                  1]
2509
  }
2510
};
2511
 
2512
(function() {
2513
  Object.extend(this.tags, {
2514
    THEAD: this.tags.TBODY,
2515
    TFOOT: this.tags.TBODY,
2516
    TH:    this.tags.TD
2517
  });
2518
}).call(Element._insertionTranslations);
2519
 
2520
Element.Methods.Simulated = {
2521
  hasAttribute: function(element, attribute) {
2522
    attribute = Element._attributeTranslations.has[attribute] || attribute;
2523
    var node = $(element).getAttributeNode(attribute);
2524
    return node && node.specified;
2525
  }
2526
};
2527
 
2528
Element.Methods.ByTag = { };
2529
 
2530
Object.extend(Element, Element.Methods);
2531
 
2532
if (!Prototype.BrowserFeatures.ElementExtensions &&
2533
    document.createElement('div').__proto__) {
2534
  window.HTMLElement = { };
2535
  window.HTMLElement.prototype = document.createElement('div').__proto__;
2536
  Prototype.BrowserFeatures.ElementExtensions = true;
2537
}
2538
 
2539
Element.extend = (function() {
2540
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
2541
    return Prototype.K;
2542
 
2543
  var Methods = { }, ByTag = Element.Methods.ByTag;
2544
 
2545
  var extend = Object.extend(function(element) {
2546
    if (!element || element._extendedByPrototype ||
2547
        element.nodeType != 1 || element == window) return element;
2548
 
2549
    var methods = Object.clone(Methods),
2550
      tagName = element.tagName, property, value;
2551
 
2552
    // extend methods for specific tags
2553
    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
2554
 
2555
    for (property in methods) {
2556
      value = methods[property];
2557
      if (Object.isFunction(value) && !(property in element))
2558
        element[property] = value.methodize();
2559
    }
2560
 
2561
    element._extendedByPrototype = Prototype.emptyFunction;
2562
    return element;
2563
 
2564
  }, {
2565
    refresh: function() {
2566
      // extend methods for all tags (Safari doesn't need this)
2567
      if (!Prototype.BrowserFeatures.ElementExtensions) {
2568
        Object.extend(Methods, Element.Methods);
2569
        Object.extend(Methods, Element.Methods.Simulated);
2570
      }
2571
    }
2572
  });
2573
 
2574
  extend.refresh();
2575
  return extend;
2576
})();
2577
 
2578
Element.hasAttribute = function(element, attribute) {
2579
  if (element.hasAttribute) return element.hasAttribute(attribute);
2580
  return Element.Methods.Simulated.hasAttribute(element, attribute);
2581
};
2582
 
2583
Element.addMethods = function(methods) {
2584
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
2585
 
2586
  if (!methods) {
2587
    Object.extend(Form, Form.Methods);
2588
    Object.extend(Form.Element, Form.Element.Methods);
2589
    Object.extend(Element.Methods.ByTag, {
2590
      "FORM":     Object.clone(Form.Methods),
2591
      "INPUT":    Object.clone(Form.Element.Methods),
2592
      "SELECT":   Object.clone(Form.Element.Methods),
2593
      "TEXTAREA": Object.clone(Form.Element.Methods)
2594
    });
2595
  }
2596
 
2597
  if (arguments.length == 2) {
2598
    var tagName = methods;
2599
    methods = arguments[1];
2600
  }
2601
 
2602
  if (!tagName) Object.extend(Element.Methods, methods || { });
2603
  else {
2604
    if (Object.isArray(tagName)) tagName.each(extend);
2605
    else extend(tagName);
2606
  }
2607
 
2608
  function extend(tagName) {
2609
    tagName = tagName.toUpperCase();
2610
    if (!Element.Methods.ByTag[tagName])
2611
      Element.Methods.ByTag[tagName] = { };
2612
    Object.extend(Element.Methods.ByTag[tagName], methods);
2613
  }
2614
 
2615
  function copy(methods, destination, onlyIfAbsent) {
2616
    onlyIfAbsent = onlyIfAbsent || false;
2617
    for (var property in methods) {
2618
      var value = methods[property];
2619
      if (!Object.isFunction(value)) continue;
2620
      if (!onlyIfAbsent || !(property in destination))
2621
        destination[property] = value.methodize();
2622
    }
2623
  }
2624
 
2625
  function findDOMClass(tagName) {
2626
    var klass;
2627
    var trans = {
2628
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
2629
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
2630
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
2631
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
2632
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
2633
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
2634
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
2635
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
2636
      "FrameSet", "IFRAME": "IFrame"
2637
    };
2638
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
2639
    if (window[klass]) return window[klass];
2640
    klass = 'HTML' + tagName + 'Element';
2641
    if (window[klass]) return window[klass];
2642
    klass = 'HTML' + tagName.capitalize() + 'Element';
2643
    if (window[klass]) return window[klass];
2644
 
2645
    window[klass] = { };
2646
    window[klass].prototype = document.createElement(tagName).__proto__;
2647
    return window[klass];
2648
  }
2649
 
2650
  if (F.ElementExtensions) {
2651
    copy(Element.Methods, HTMLElement.prototype);
2652
    copy(Element.Methods.Simulated, HTMLElement.prototype, true);
2653
  }
2654
 
2655
  if (F.SpecificElementExtensions) {
2656
    for (var tag in Element.Methods.ByTag) {
2657
      var klass = findDOMClass(tag);
2658
      if (Object.isUndefined(klass)) continue;
2659
      copy(T[tag], klass.prototype);
2660
    }
2661
  }
2662
 
2663
  Object.extend(Element, Element.Methods);
2664
  delete Element.ByTag;
2665
 
2666
  if (Element.extend.refresh) Element.extend.refresh();
2667
  Element.cache = { };
2668
};
2669
 
2670
document.viewport = {
2671
  getDimensions: function() {
2672
    var dimensions = { };
2673
    var B = Prototype.Browser;
2674
    $w('width height').each(function(d) {
2675
      var D = d.capitalize();
2676
      dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D] :
2677
        (B.Opera) ? document.body['client' + D] : document.documentElement['client' + D];
2678
    });
2679
    return dimensions;
2680
  },
2681
 
2682
  getWidth: function() {
2683
    return this.getDimensions().width;
2684
  },
2685
 
2686
  getHeight: function() {
2687
    return this.getDimensions().height;
2688
  },
2689
 
2690
  getScrollOffsets: function() {
2691
    return Element._returnOffset(
2692
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
2693
      window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
2694
  }
2695
};
2696
/* Portions of the Selector class are derived from Jack Slocum’s DomQuery,
2697
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
2698
 * license.  Please see http://www.yui-ext.com/ for more information. */
2699
 
2700
var Selector = Class.create({
2701
  initialize: function(expression) {
2702
    this.expression = expression.strip();
2703
    this.compileMatcher();
2704
  },
2705
 
2706
  shouldUseXPath: function() {
2707
    if (!Prototype.BrowserFeatures.XPath) return false;
2708
 
2709
    var e = this.expression;
2710
 
2711
    // Safari 3 chokes on :*-of-type and :empty
2712
    if (Prototype.Browser.WebKit &&
2713
     (e.include("-of-type") || e.include(":empty")))
2714
      return false;
2715
 
2716
    // XPath can't do namespaced attributes, nor can it read
2717
    // the "checked" property from DOM nodes
2718
    if ((/(\[[\w-]*?:|:checked)/).test(this.expression))
2719
      return false;
2720
 
2721
    return true;
2722
  },
2723
 
2724
  compileMatcher: function() {
2725
    if (this.shouldUseXPath())
2726
      return this.compileXPathMatcher();
2727
 
2728
    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
2729
        c = Selector.criteria, le, p, m;
2730
 
2731
    if (Selector._cache[e]) {
2732
      this.matcher = Selector._cache[e];
2733
      return;
2734
    }
2735
 
2736
    this.matcher = ["this.matcher = function(root) {",
2737
                    "var r = root, h = Selector.handlers, c = false, n;"];
2738
 
2739
    while (e && le != e && (/\S/).test(e)) {
2740
      le = e;
2741
      for (var i in ps) {
2742
        p = ps[i];
2743
        if (m = e.match(p)) {
2744
          this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
2745
    	      new Template(c[i]).evaluate(m));
2746
          e = e.replace(m[0], '');
2747
          break;
2748
        }
2749
      }
2750
    }
2751
 
2752
    this.matcher.push("return h.unique(n);\n}");
2753
    eval(this.matcher.join('\n'));
2754
    Selector._cache[this.expression] = this.matcher;
2755
  },
2756
 
2757
  compileXPathMatcher: function() {
2758
    var e = this.expression, ps = Selector.patterns,
2759
        x = Selector.xpath, le, m;
2760
 
2761
    if (Selector._cache[e]) {
2762
      this.xpath = Selector._cache[e]; return;
2763
    }
2764
 
2765
    this.matcher = ['.//*'];
2766
    while (e && le != e && (/\S/).test(e)) {
2767
      le = e;
2768
      for (var i in ps) {
2769
        if (m = e.match(ps[i])) {
2770
          this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
2771
            new Template(x[i]).evaluate(m));
2772
          e = e.replace(m[0], '');
2773
          break;
2774
        }
2775
      }
2776
    }
2777
 
2778
    this.xpath = this.matcher.join('');
2779
    Selector._cache[this.expression] = this.xpath;
2780
  },
2781
 
2782
  findElements: function(root) {
2783
    root = root || document;
2784
    if (this.xpath) return document._getElementsByXPath(this.xpath, root);
2785
    return this.matcher(root);
2786
  },
2787
 
2788
  match: function(element) {
2789
    this.tokens = [];
2790
 
2791
    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
2792
    var le, p, m;
2793
 
2794
    while (e && le !== e && (/\S/).test(e)) {
2795
      le = e;
2796
      for (var i in ps) {
2797
        p = ps[i];
2798
        if (m = e.match(p)) {
2799
          // use the Selector.assertions methods unless the selector
2800
          // is too complex.
2801
          if (as[i]) {
2802
            this.tokens.push([i, Object.clone(m)]);
2803
            e = e.replace(m[0], '');
2804
          } else {
2805
            // reluctantly do a document-wide search
2806
            // and look for a match in the array
2807
            return this.findElements(document).include(element);
2808
          }
2809
        }
2810
      }
2811
    }
2812
 
2813
    var match = true, name, matches;
2814
    for (var i = 0, token; token = this.tokens[i]; i++) {
2815
      name = token[0], matches = token[1];
2816
      if (!Selector.assertions[name](element, matches)) {
2817
        match = false; break;
2818
      }
2819
    }
2820
 
2821
    return match;
2822
  },
2823
 
2824
  toString: function() {
2825
    return this.expression;
2826
  },
2827
 
2828
  inspect: function() {
2829
    return "#<Selector:" + this.expression.inspect() + ">";
2830
  }
2831
});
2832
 
2833
Object.extend(Selector, {
2834
  _cache: { },
2835
 
2836
  xpath: {
2837
    descendant:   "//*",
2838
    child:        "/*",
2839
    adjacent:     "/following-sibling::*[1]",
2840
    laterSibling: '/following-sibling::*',
2841
    tagName:      function(m) {
2842
      if (m[1] == '*') return '';
2843
      return "[local-name()='" + m[1].toLowerCase() +
2844
             "' or local-name()='" + m[1].toUpperCase() + "']";
2845
    },
2846
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
2847
    id:           "[@id='#{1}']",
2848
    attrPresence: function(m) {
2849
      m[1] = m[1].toLowerCase();
2850
      return new Template("[@#{1}]").evaluate(m);
2851
    },
2852
    attr: function(m) {
2853
      m[1] = m[1].toLowerCase();
2854
      m[3] = m[5] || m[6];
2855
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
2856
    },
2857
    pseudo: function(m) {
2858
      var h = Selector.xpath.pseudos[m[1]];
2859
      if (!h) return '';
2860
      if (Object.isFunction(h)) return h(m);
2861
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
2862
    },
2863
    operators: {
2864
      '=':  "[@#{1}='#{3}']",
2865
      '!=': "[@#{1}!='#{3}']",
2866
      '^=': "[starts-with(@#{1}, '#{3}')]",
2867
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
2868
      '*=': "[contains(@#{1}, '#{3}')]",
2869
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
2870
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
2871
    },
2872
    pseudos: {
2873
      'first-child': '[not(preceding-sibling::*)]',
2874
      'last-child':  '[not(following-sibling::*)]',
2875
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
2876
      'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
2877
      'checked':     "[@checked]",
2878
      'disabled':    "[@disabled]",
2879
      'enabled':     "[not(@disabled)]",
2880
      'not': function(m) {
2881
        var e = m[6], p = Selector.patterns,
2882
            x = Selector.xpath, le, v;
2883
 
2884
        var exclusion = [];
2885
        while (e && le != e && (/\S/).test(e)) {
2886
          le = e;
2887
          for (var i in p) {
2888
            if (m = e.match(p[i])) {
2889
              v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
2890
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
2891
              e = e.replace(m[0], '');
2892
              break;
2893
            }
2894
          }
2895
        }
2896
        return "[not(" + exclusion.join(" and ") + ")]";
2897
      },
2898
      'nth-child':      function(m) {
2899
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
2900
      },
2901
      'nth-last-child': function(m) {
2902
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
2903
      },
2904
      'nth-of-type':    function(m) {
2905
        return Selector.xpath.pseudos.nth("position() ", m);
2906
      },
2907
      'nth-last-of-type': function(m) {
2908
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
2909
      },
2910
      'first-of-type':  function(m) {
2911
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
2912
      },
2913
      'last-of-type':   function(m) {
2914
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
2915
      },
2916
      'only-of-type':   function(m) {
2917
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
2918
      },
2919
      nth: function(fragment, m) {
2920
        var mm, formula = m[6], predicate;
2921
        if (formula == 'even') formula = '2n+0';
2922
        if (formula == 'odd')  formula = '2n+1';
2923
        if (mm = formula.match(/^(\d+)$/)) // digit only
2924
          return '[' + fragment + "= " + mm[1] + ']';
2925
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
2926
          if (mm[1] == "-") mm[1] = -1;
2927
          var a = mm[1] ? Number(mm[1]) : 1;
2928
          var b = mm[2] ? Number(mm[2]) : 0;
2929
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
2930
          "((#{fragment} - #{b}) div #{a} >= 0)]";
2931
          return new Template(predicate).evaluate({
2932
            fragment: fragment, a: a, b: b });
2933
        }
2934
      }
2935
    }
2936
  },
2937
 
2938
  criteria: {
2939
    tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
2940
    className:    'n = h.className(n, r, "#{1}", c);    c = false;',
2941
    id:           'n = h.id(n, r, "#{1}", c);           c = false;',
2942
    attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
2943
    attr: function(m) {
2944
      m[3] = (m[5] || m[6]);
2945
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
2946
    },
2947
    pseudo: function(m) {
2948
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
2949
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
2950
    },
2951
    descendant:   'c = "descendant";',
2952
    child:        'c = "child";',
2953
    adjacent:     'c = "adjacent";',
2954
    laterSibling: 'c = "laterSibling";'
2955
  },
2956
 
2957
  patterns: {
2958
    // combinators must be listed first
2959
    // (and descendant needs to be last combinator)
2960
    laterSibling: /^\s*~\s*/,
2961
    child:        /^\s*>\s*/,
2962
    adjacent:     /^\s*\+\s*/,
2963
    descendant:   /^\s/,
2964
 
2965
    // selectors follow
2966
    tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
2967
    id:           /^#([\w\-\*]+)(\b|$)/,
2968
    className:    /^\.([\w\-\*]+)(\b|$)/,
2969
    pseudo:
2970
/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
2971
    attrPresence: /^\[([\w]+)\]/,
2972
    attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
2973
  },
2974
 
2975
  // for Selector.match and Element#match
2976
  assertions: {
2977
    tagName: function(element, matches) {
2978
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
2979
    },
2980
 
2981
    className: function(element, matches) {
2982
      return Element.hasClassName(element, matches[1]);
2983
    },
2984
 
2985
    id: function(element, matches) {
2986
      return element.id === matches[1];
2987
    },
2988
 
2989
    attrPresence: function(element, matches) {
2990
      return Element.hasAttribute(element, matches[1]);
2991
    },
2992
 
2993
    attr: function(element, matches) {
2994
      var nodeValue = Element.readAttribute(element, matches[1]);
2995
      return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
2996
    }
2997
  },
2998
 
2999
  handlers: {
3000
    // UTILITY FUNCTIONS
3001
    // joins two collections
3002
    concat: function(a, b) {
3003
      for (var i = 0, node; node = b[i]; i++)
3004
        a.push(node);
3005
      return a;
3006
    },
3007
 
3008
    // marks an array of nodes for counting
3009
    mark: function(nodes) {
3010
      var _true = Prototype.emptyFunction;
3011
      for (var i = 0, node; node = nodes[i]; i++)
3012
        node._countedByPrototype = _true;
3013
      return nodes;
3014
    },
3015
 
3016
    unmark: function(nodes) {
3017
      for (var i = 0, node; node = nodes[i]; i++)
3018
        node._countedByPrototype = undefined;
3019
      return nodes;
3020
    },
3021
 
3022
    // mark each child node with its position (for nth calls)
3023
    // "ofType" flag indicates whether we're indexing for nth-of-type
3024
    // rather than nth-child
3025
    index: function(parentNode, reverse, ofType) {
3026
      parentNode._countedByPrototype = Prototype.emptyFunction;
3027
      if (reverse) {
3028
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
3029
          var node = nodes[i];
3030
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
3031
        }
3032
      } else {
3033
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
3034
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
3035
      }
3036
    },
3037
 
3038
    // filters out duplicates and extends all nodes
3039
    unique: function(nodes) {
3040
      if (nodes.length == 0) return nodes;
3041
      var results = [], n;
3042
      for (var i = 0, l = nodes.length; i < l; i++)
3043
        if (!(n = nodes[i])._countedByPrototype) {
3044
          n._countedByPrototype = Prototype.emptyFunction;
3045
          results.push(Element.extend(n));
3046
        }
3047
      return Selector.handlers.unmark(results);
3048
    },
3049
 
3050
    // COMBINATOR FUNCTIONS
3051
    descendant: function(nodes) {
3052
      var h = Selector.handlers;
3053
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3054
        h.concat(results, node.getElementsByTagName('*'));
3055
      return results;
3056
    },
3057
 
3058
    child: function(nodes) {
3059
      var h = Selector.handlers;
3060
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3061
        for (var j = 0, child; child = node.childNodes[j]; j++)
3062
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
3063
      }
3064
      return results;
3065
    },
3066
 
3067
    adjacent: function(nodes) {
3068
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3069
        var next = this.nextElementSibling(node);
3070
        if (next) results.push(next);
3071
      }
3072
      return results;
3073
    },
3074
 
3075
    laterSibling: function(nodes) {
3076
      var h = Selector.handlers;
3077
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3078
        h.concat(results, Element.nextSiblings(node));
3079
      return results;
3080
    },
3081
 
3082
    nextElementSibling: function(node) {
3083
      while (node = node.nextSibling)
3084
	      if (node.nodeType == 1) return node;
3085
      return null;
3086
    },
3087
 
3088
    previousElementSibling: function(node) {
3089
      while (node = node.previousSibling)
3090
        if (node.nodeType == 1) return node;
3091
      return null;
3092
    },
3093
 
3094
    // TOKEN FUNCTIONS
3095
    tagName: function(nodes, root, tagName, combinator) {
3096
      var uTagName = tagName.toUpperCase();
3097
      var results = [], h = Selector.handlers;
3098
      if (nodes) {
3099
        if (combinator) {
3100
          // fastlane for ordinary descendant combinators
3101
          if (combinator == "descendant") {
3102
            for (var i = 0, node; node = nodes[i]; i++)
3103
              h.concat(results, node.getElementsByTagName(tagName));
3104
            return results;
3105
          } else nodes = this[combinator](nodes);
3106
          if (tagName == "*") return nodes;
3107
        }
3108
        for (var i = 0, node; node = nodes[i]; i++)
3109
          if (node.tagName.toUpperCase() === uTagName) results.push(node);
3110
        return results;
3111
      } else return root.getElementsByTagName(tagName);
3112
    },
3113
 
3114
    id: function(nodes, root, id, combinator) {
3115
      var targetNode = $(id), h = Selector.handlers;
3116
      if (!targetNode) return [];
3117
      if (!nodes && root == document) return [targetNode];
3118
      if (nodes) {
3119
        if (combinator) {
3120
          if (combinator == 'child') {
3121
            for (var i = 0, node; node = nodes[i]; i++)
3122
              if (targetNode.parentNode == node) return [targetNode];
3123
          } else if (combinator == 'descendant') {
3124
            for (var i = 0, node; node = nodes[i]; i++)
3125
              if (Element.descendantOf(targetNode, node)) return [targetNode];
3126
          } else if (combinator == 'adjacent') {
3127
            for (var i = 0, node; node = nodes[i]; i++)
3128
              if (Selector.handlers.previousElementSibling(targetNode) == node)
3129
                return [targetNode];
3130
          } else nodes = h[combinator](nodes);
3131
        }
3132
        for (var i = 0, node; node = nodes[i]; i++)
3133
          if (node == targetNode) return [targetNode];
3134
        return [];
3135
      }
3136
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
3137
    },
3138
 
3139
    className: function(nodes, root, className, combinator) {
3140
      if (nodes && combinator) nodes = this[combinator](nodes);
3141
      return Selector.handlers.byClassName(nodes, root, className);
3142
    },
3143
 
3144
    byClassName: function(nodes, root, className) {
3145
      if (!nodes) nodes = Selector.handlers.descendant([root]);
3146
      var needle = ' ' + className + ' ';
3147
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
3148
        nodeClassName = node.className;
3149
        if (nodeClassName.length == 0) continue;
3150
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
3151
          results.push(node);
3152
      }
3153
      return results;
3154
    },
3155
 
3156
    attrPresence: function(nodes, root, attr, combinator) {
3157
      if (!nodes) nodes = root.getElementsByTagName("*");
3158
      if (nodes && combinator) nodes = this[combinator](nodes);
3159
      var results = [];
3160
      for (var i = 0, node; node = nodes[i]; i++)
3161
        if (Element.hasAttribute(node, attr)) results.push(node);
3162
      return results;
3163
    },
3164
 
3165
    attr: function(nodes, root, attr, value, operator, combinator) {
3166
      if (!nodes) nodes = root.getElementsByTagName("*");
3167
      if (nodes && combinator) nodes = this[combinator](nodes);
3168
      var handler = Selector.operators[operator], results = [];
3169
      for (var i = 0, node; node = nodes[i]; i++) {
3170
        var nodeValue = Element.readAttribute(node, attr);
3171
        if (nodeValue === null) continue;
3172
        if (handler(nodeValue, value)) results.push(node);
3173
      }
3174
      return results;
3175
    },
3176
 
3177
    pseudo: function(nodes, name, value, root, combinator) {
3178
      if (nodes && combinator) nodes = this[combinator](nodes);
3179
      if (!nodes) nodes = root.getElementsByTagName("*");
3180
      return Selector.pseudos[name](nodes, value, root);
3181
    }
3182
  },
3183
 
3184
  pseudos: {
3185
    'first-child': function(nodes, value, root) {
3186
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3187
        if (Selector.handlers.previousElementSibling(node)) continue;
3188
          results.push(node);
3189
      }
3190
      return results;
3191
    },
3192
    'last-child': function(nodes, value, root) {
3193
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3194
        if (Selector.handlers.nextElementSibling(node)) continue;
3195
          results.push(node);
3196
      }
3197
      return results;
3198
    },
3199
    'only-child': function(nodes, value, root) {
3200
      var h = Selector.handlers;
3201
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3202
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
3203
          results.push(node);
3204
      return results;
3205
    },
3206
    'nth-child':        function(nodes, formula, root) {
3207
      return Selector.pseudos.nth(nodes, formula, root);
3208
    },
3209
    'nth-last-child':   function(nodes, formula, root) {
3210
      return Selector.pseudos.nth(nodes, formula, root, true);
3211
    },
3212
    'nth-of-type':      function(nodes, formula, root) {
3213
      return Selector.pseudos.nth(nodes, formula, root, false, true);
3214
    },
3215
    'nth-last-of-type': function(nodes, formula, root) {
3216
      return Selector.pseudos.nth(nodes, formula, root, true, true);
3217
    },
3218
    'first-of-type':    function(nodes, formula, root) {
3219
      return Selector.pseudos.nth(nodes, "1", root, false, true);
3220
    },
3221
    'last-of-type':     function(nodes, formula, root) {
3222
      return Selector.pseudos.nth(nodes, "1", root, true, true);
3223
    },
3224
    'only-of-type':     function(nodes, formula, root) {
3225
      var p = Selector.pseudos;
3226
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
3227
    },
3228
 
3229
    // handles the an+b logic
3230
    getIndices: function(a, b, total) {
3231
      if (a == 0) return b > 0 ? [b] : [];
3232
      return $R(1, total).inject([], function(memo, i) {
3233
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
3234
        return memo;
3235
      });
3236
    },
3237
 
3238
    // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
3239
    nth: function(nodes, formula, root, reverse, ofType) {
3240
      if (nodes.length == 0) return [];
3241
      if (formula == 'even') formula = '2n+0';
3242
      if (formula == 'odd')  formula = '2n+1';
3243
      var h = Selector.handlers, results = [], indexed = [], m;
3244
      h.mark(nodes);
3245
      for (var i = 0, node; node = nodes[i]; i++) {
3246
        if (!node.parentNode._countedByPrototype) {
3247
          h.index(node.parentNode, reverse, ofType);
3248
          indexed.push(node.parentNode);
3249
        }
3250
      }
3251
      if (formula.match(/^\d+$/)) { // just a number
3252
        formula = Number(formula);
3253
        for (var i = 0, node; node = nodes[i]; i++)
3254
          if (node.nodeIndex == formula) results.push(node);
3255
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
3256
        if (m[1] == "-") m[1] = -1;
3257
        var a = m[1] ? Number(m[1]) : 1;
3258
        var b = m[2] ? Number(m[2]) : 0;
3259
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
3260
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
3261
          for (var j = 0; j < l; j++)
3262
            if (node.nodeIndex == indices[j]) results.push(node);
3263
        }
3264
      }
3265
      h.unmark(nodes);
3266
      h.unmark(indexed);
3267
      return results;
3268
    },
3269
 
3270
    'empty': function(nodes, value, root) {
3271
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3272
        // IE treats comments as element nodes
3273
        if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
3274
        results.push(node);
3275
      }
3276
      return results;
3277
    },
3278
 
3279
    'not': function(nodes, selector, root) {
3280
      var h = Selector.handlers, selectorType, m;
3281
      var exclusions = new Selector(selector).findElements(root);
3282
      h.mark(exclusions);
3283
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3284
        if (!node._countedByPrototype) results.push(node);
3285
      h.unmark(exclusions);
3286
      return results;
3287
    },
3288
 
3289
    'enabled': function(nodes, value, root) {
3290
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3291
        if (!node.disabled) results.push(node);
3292
      return results;
3293
    },
3294
 
3295
    'disabled': function(nodes, value, root) {
3296
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3297
        if (node.disabled) results.push(node);
3298
      return results;
3299
    },
3300
 
3301
    'checked': function(nodes, value, root) {
3302
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3303
        if (node.checked) results.push(node);
3304
      return results;
3305
    }
3306
  },
3307
 
3308
  operators: {
3309
    '=':  function(nv, v) { return nv == v; },
3310
    '!=': function(nv, v) { return nv != v; },
3311
    '^=': function(nv, v) { return nv.startsWith(v); },
3312
    '$=': function(nv, v) { return nv.endsWith(v); },
3313
    '*=': function(nv, v) { return nv.include(v); },
3314
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
3315
    '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
3316
  },
3317
 
3318
  split: function(expression) {
3319
    var expressions = [];
3320
    expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
3321
      expressions.push(m[1].strip());
3322
    });
3323
    return expressions;
3324
  },
3325
 
3326
  matchElements: function(elements, expression) {
3327
    var matches = $$(expression), h = Selector.handlers;
3328
    h.mark(matches);
3329
    for (var i = 0, results = [], element; element = elements[i]; i++)
3330
      if (element._countedByPrototype) results.push(element);
3331
    h.unmark(matches);
3332
    return results;
3333
  },
3334
 
3335
  findElement: function(elements, expression, index) {
3336
    if (Object.isNumber(expression)) {
3337
      index = expression; expression = false;
3338
    }
3339
    return Selector.matchElements(elements, expression || '*')[index || 0];
3340
  },
3341
 
3342
  findChildElements: function(element, expressions) {
3343
    expressions = Selector.split(expressions.join(','));
3344
    var results = [], h = Selector.handlers;
3345
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
3346
      selector = new Selector(expressions[i].strip());
3347
      h.concat(results, selector.findElements(element));
3348
    }
3349
    return (l > 1) ? h.unique(results) : results;
3350
  }
3351
});
3352
 
3353
if (Prototype.Browser.IE) {
3354
  Object.extend(Selector.handlers, {
3355
    // IE returns comment nodes on getElementsByTagName("*").
3356
    // Filter them out.
3357
    concat: function(a, b) {
3358
      for (var i = 0, node; node = b[i]; i++)
3359
        if (node.tagName !== "!") a.push(node);
3360
      return a;
3361
    },
3362
 
3363
    // IE improperly serializes _countedByPrototype in (inner|outer)HTML.
3364
    unmark: function(nodes) {
3365
      for (var i = 0, node; node = nodes[i]; i++)
3366
        node.removeAttribute('_countedByPrototype');
3367
      return nodes;
3368
    }
3369
  });
3370
}
3371
 
3372
function $$() {
3373
  return Selector.findChildElements(document, $A(arguments));
3374
}
3375
var Form = {
3376
  reset: function(form) {
3377
    $(form).reset();
3378
    return form;
3379
  },
3380
 
3381
  serializeElements: function(elements, options) {
3382
    if (typeof options != 'object') options = { hash: !!options };
3383
    else if (Object.isUndefined(options.hash)) options.hash = true;
3384
    var key, value, submitted = false, submit = options.submit;
3385
 
3386
    var data = elements.inject({ }, function(result, element) {
3387
      if (!element.disabled && element.name) {
3388
        key = element.name; value = $(element).getValue();
3389
        if (value != null && (element.type != 'submit' || (!submitted &&
3390
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
3391
          if (key in result) {
3392
            // a key is already present; construct an array of values
3393
            if (!Object.isArray(result[key])) result[key] = [result[key]];
3394
            result[key].push(value);
3395
          }
3396
          else result[key] = value;
3397
        }
3398
      }
3399
      return result;
3400
    });
3401
 
3402
    return options.hash ? data : Object.toQueryString(data);
3403
  }
3404
};
3405
 
3406
Form.Methods = {
3407
  serialize: function(form, options) {
3408
    return Form.serializeElements(Form.getElements(form), options);
3409
  },
3410
 
3411
  getElements: function(form) {
3412
    return $A($(form).getElementsByTagName('*')).inject([],
3413
      function(elements, child) {
3414
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
3415
          elements.push(Element.extend(child));
3416
        return elements;
3417
      }
3418
    );
3419
  },
3420
 
3421
  getInputs: function(form, typeName, name) {
3422
    form = $(form);
3423
    var inputs = form.getElementsByTagName('input');
3424
 
3425
    if (!typeName && !name) return $A(inputs).map(Element.extend);
3426
 
3427
    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
3428
      var input = inputs[i];
3429
      if ((typeName && input.type != typeName) || (name && input.name != name))
3430
        continue;
3431
      matchingInputs.push(Element.extend(input));
3432
    }
3433
 
3434
    return matchingInputs;
3435
  },
3436
 
3437
  disable: function(form) {
3438
    form = $(form);
3439
    Form.getElements(form).invoke('disable');
3440
    return form;
3441
  },
3442
 
3443
  enable: function(form) {
3444
    form = $(form);
3445
    Form.getElements(form).invoke('enable');
3446
    return form;
3447
  },
3448
 
3449
  findFirstElement: function(form) {
3450
    var elements = $(form).getElements().findAll(function(element) {
3451
      return 'hidden' != element.type && !element.disabled;
3452
    });
3453
    var firstByIndex = elements.findAll(function(element) {
3454
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
3455
    }).sortBy(function(element) { return element.tabIndex }).first();
3456
 
3457
    return firstByIndex ? firstByIndex : elements.find(function(element) {
3458
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
3459
    });
3460
  },
3461
 
3462
  focusFirstElement: function(form) {
3463
    form = $(form);
3464
    form.findFirstElement().activate();
3465
    return form;
3466
  },
3467
 
3468
  request: function(form, options) {
3469
    form = $(form), options = Object.clone(options || { });
3470
 
3471
    var params = options.parameters, action = form.readAttribute('action') || '';
3472
    if (action.blank()) action = window.location.href;
3473
    options.parameters = form.serialize(true);
3474
 
3475
    if (params) {
3476
      if (Object.isString(params)) params = params.toQueryParams();
3477
      Object.extend(options.parameters, params);
3478
    }
3479
 
3480
    if (form.hasAttribute('method') && !options.method)
3481
      options.method = form.method;
3482
 
3483
    return new Ajax.Request(action, options);
3484
  }
3485
};
3486
 
3487
/*--------------------------------------------------------------------------*/
3488
 
3489
Form.Element = {
3490
  focus: function(element) {
3491
    $(element).focus();
3492
    return element;
3493
  },
3494
 
3495
  select: function(element) {
3496
    $(element).select();
3497
    return element;
3498
  }
3499
};
3500
 
3501
Form.Element.Methods = {
3502
  serialize: function(element) {
3503
    element = $(element);
3504
    if (!element.disabled && element.name) {
3505
      var value = element.getValue();
3506
      if (value != undefined) {
3507
        var pair = { };
3508
        pair[element.name] = value;
3509
        return Object.toQueryString(pair);
3510
      }
3511
    }
3512
    return '';
3513
  },
3514
 
3515
  getValue: function(element) {
3516
    element = $(element);
3517
    var method = element.tagName.toLowerCase();
3518
    return Form.Element.Serializers[method](element);
3519
  },
3520
 
3521
  setValue: function(element, value) {
3522
    element = $(element);
3523
    var method = element.tagName.toLowerCase();
3524
    Form.Element.Serializers[method](element, value);
3525
    return element;
3526
  },
3527
 
3528
  clear: function(element) {
3529
    $(element).value = '';
3530
    return element;
3531
  },
3532
 
3533
  present: function(element) {
3534
    return $(element).value != '';
3535
  },
3536
 
3537
  activate: function(element) {
3538
    element = $(element);
3539
    try {
3540
      element.focus();
3541
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
3542
          !['button', 'reset', 'submit'].include(element.type)))
3543
        element.select();
3544
    } catch (e) { }
3545
    return element;
3546
  },
3547
 
3548
  disable: function(element) {
3549
    element = $(element);
3550
    element.blur();
3551
    element.disabled = true;
3552
    return element;
3553
  },
3554
 
3555
  enable: function(element) {
3556
    element = $(element);
3557
    element.disabled = false;
3558
    return element;
3559
  }
3560
};
3561
 
3562
/*--------------------------------------------------------------------------*/
3563
 
3564
var Field = Form.Element;
3565
var $F = Form.Element.Methods.getValue;
3566
 
3567
/*--------------------------------------------------------------------------*/
3568
 
3569
Form.Element.Serializers = {
3570
  input: function(element, value) {
3571
    switch (element.type.toLowerCase()) {
3572
      case 'checkbox':
3573
      case 'radio':
3574
        return Form.Element.Serializers.inputSelector(element, value);
3575
      default:
3576
        return Form.Element.Serializers.textarea(element, value);
3577
    }
3578
  },
3579
 
3580
  inputSelector: function(element, value) {
3581
    if (Object.isUndefined(value)) return element.checked ? element.value : null;
3582
    else element.checked = !!value;
3583
  },
3584
 
3585
  textarea: function(element, value) {
3586
    if (Object.isUndefined(value)) return element.value;
3587
    else element.value = value;
3588
  },
3589
 
3590
  select: function(element, index) {
3591
    if (Object.isUndefined(index))
3592
      return this[element.type == 'select-one' ?
3593
        'selectOne' : 'selectMany'](element);
3594
    else {
3595
      var opt, value, single = !Object.isArray(index);
3596
      for (var i = 0, length = element.length; i < length; i++) {
3597
        opt = element.options[i];
3598
        value = this.optionValue(opt);
3599
        if (single) {
3600
          if (value == index) {
3601
            opt.selected = true;
3602
            return;
3603
          }
3604
        }
3605
        else opt.selected = index.include(value);
3606
      }
3607
    }
3608
  },
3609
 
3610
  selectOne: function(element) {
3611
    var index = element.selectedIndex;
3612
    return index >= 0 ? this.optionValue(element.options[index]) : null;
3613
  },
3614
 
3615
  selectMany: function(element) {
3616
    var values, length = element.length;
3617
    if (!length) return null;
3618
 
3619
    for (var i = 0, values = []; i < length; i++) {
3620
      var opt = element.options[i];
3621
      if (opt.selected) values.push(this.optionValue(opt));
3622
    }
3623
    return values;
3624
  },
3625
 
3626
  optionValue: function(opt) {
3627
    // extend element because hasAttribute may not be native
3628
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
3629
  }
3630
};
3631
 
3632
/*--------------------------------------------------------------------------*/
3633
 
3634
Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
3635
  initialize: function($super, element, frequency, callback) {
3636
    $super(callback, frequency);
3637
    this.element   = $(element);
3638
    this.lastValue = this.getValue();
3639
  },
3640
 
3641
  execute: function() {
3642
    var value = this.getValue();
3643
    if (Object.isString(this.lastValue) && Object.isString(value) ?
3644
        this.lastValue != value : String(this.lastValue) != String(value)) {
3645
      this.callback(this.element, value);
3646
      this.lastValue = value;
3647
    }
3648
  }
3649
});
3650
 
3651
Form.Element.Observer = Class.create(Abstract.TimedObserver, {
3652
  getValue: function() {
3653
    return Form.Element.getValue(this.element);
3654
  }
3655
});
3656
 
3657
Form.Observer = Class.create(Abstract.TimedObserver, {
3658
  getValue: function() {
3659
    return Form.serialize(this.element);
3660
  }
3661
});
3662
 
3663
/*--------------------------------------------------------------------------*/
3664
 
3665
Abstract.EventObserver = Class.create({
3666
  initialize: function(element, callback) {
3667
    this.element  = $(element);
3668
    this.callback = callback;
3669
 
3670
    this.lastValue = this.getValue();
3671
    if (this.element.tagName.toLowerCase() == 'form')
3672
      this.registerFormCallbacks();
3673
    else
3674
      this.registerCallback(this.element);
3675
  },
3676
 
3677
  onElementEvent: function() {
3678
    var value = this.getValue();
3679
    if (this.lastValue != value) {
3680
      this.callback(this.element, value);
3681
      this.lastValue = value;
3682
    }
3683
  },
3684
 
3685
  registerFormCallbacks: function() {
3686
    Form.getElements(this.element).each(this.registerCallback, this);
3687
  },
3688
 
3689
  registerCallback: function(element) {
3690
    if (element.type) {
3691
      switch (element.type.toLowerCase()) {
3692
        case 'checkbox':
3693
        case 'radio':
3694
          Event.observe(element, 'click', this.onElementEvent.bind(this));
3695
          break;
3696
        default:
3697
          Event.observe(element, 'change', this.onElementEvent.bind(this));
3698
          break;
3699
      }
3700
    }
3701
  }
3702
});
3703
 
3704
Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
3705
  getValue: function() {
3706
    return Form.Element.getValue(this.element);
3707
  }
3708
});
3709
 
3710
Form.EventObserver = Class.create(Abstract.EventObserver, {
3711
  getValue: function() {
3712
    return Form.serialize(this.element);
3713
  }
3714
});
3715
if (!window.Event) var Event = { };
3716
 
3717
Object.extend(Event, {
3718
  KEY_BACKSPACE: 8,
3719
  KEY_TAB:       9,
3720
  KEY_RETURN:   13,
3721
  KEY_ESC:      27,
3722
  KEY_LEFT:     37,
3723
  KEY_UP:       38,
3724
  KEY_RIGHT:    39,
3725
  KEY_DOWN:     40,
3726
  KEY_DELETE:   46,
3727
  KEY_HOME:     36,
3728
  KEY_END:      35,
3729
  KEY_PAGEUP:   33,
3730
  KEY_PAGEDOWN: 34,
3731
  KEY_INSERT:   45,
3732
 
3733
  cache: { },
3734
 
3735
  relatedTarget: function(event) {
3736
    var element;
3737
    switch(event.type) {
3738
      case 'mouseover': element = event.fromElement; break;
3739
      case 'mouseout':  element = event.toElement;   break;
3740
      default: return null;
3741
    }
3742
    return Element.extend(element);
3743
  }
3744
});
3745
 
3746
Event.Methods = (function() {
3747
  var isButton;
3748
 
3749
  if (Prototype.Browser.IE) {
3750
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
3751
    isButton = function(event, code) {
3752
      return event.button == buttonMap[code];
3753
    };
3754
 
3755
  } else if (Prototype.Browser.WebKit) {
3756
    isButton = function(event, code) {
3757
      switch (code) {
3758
        case 0: return event.which == 1 && !event.metaKey;
3759
        case 1: return event.which == 1 && event.metaKey;
3760
        default: return false;
3761
      }
3762
    };
3763
 
3764
  } else {
3765
    isButton = function(event, code) {
3766
      return event.which ? (event.which === code + 1) : (event.button === code);
3767
    };
3768
  }
3769
 
3770
  return {
3771
    isLeftClick:   function(event) { return isButton(event, 0) },
3772
    isMiddleClick: function(event) { return isButton(event, 1) },
3773
    isRightClick:  function(event) { return isButton(event, 2) },
3774
 
3775
    element: function(event) {
3776
      var node = Event.extend(event).target;
3777
      return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
3778
    },
3779
 
3780
    findElement: function(event, expression) {
3781
      var element = Event.element(event);
3782
      if (!expression) return element;
3783
      var elements = [element].concat(element.ancestors());
3784
      return Selector.findElement(elements, expression, 0);
3785
    },
3786
 
3787
    pointer: function(event) {
3788
      return {
3789
        x: event.pageX || (event.clientX +
3790
          (document.documentElement.scrollLeft || document.body.scrollLeft)),
3791
        y: event.pageY || (event.clientY +
3792
          (document.documentElement.scrollTop || document.body.scrollTop))
3793
      };
3794
    },
3795
 
3796
    pointerX: function(event) { return Event.pointer(event).x },
3797
    pointerY: function(event) { return Event.pointer(event).y },
3798
 
3799
    stop: function(event) {
3800
      Event.extend(event);
3801
      event.preventDefault();
3802
      event.stopPropagation();
3803
      event.stopped = true;
3804
    }
3805
  };
3806
})();
3807
 
3808
Event.extend = (function() {
3809
  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
3810
    m[name] = Event.Methods[name].methodize();
3811
    return m;
3812
  });
3813
 
3814
  if (Prototype.Browser.IE) {
3815
    Object.extend(methods, {
3816
      stopPropagation: function() { this.cancelBubble = true },
3817
      preventDefault:  function() { this.returnValue = false },
3818
      inspect: function() { return "[object Event]" }
3819
    });
3820
 
3821
    return function(event) {
3822
      if (!event) return false;
3823
      if (event._extendedByPrototype) return event;
3824
 
3825
      event._extendedByPrototype = Prototype.emptyFunction;
3826
      var pointer = Event.pointer(event);
3827
      Object.extend(event, {
3828
        target: event.srcElement,
3829
        relatedTarget: Event.relatedTarget(event),
3830
        pageX:  pointer.x,
3831
        pageY:  pointer.y
3832
      });
3833
      return Object.extend(event, methods);
3834
    };
3835
 
3836
  } else {
3837
    Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__;
3838
    Object.extend(Event.prototype, methods);
3839
    return Prototype.K;
3840
  }
3841
})();
3842
 
3843
Object.extend(Event, (function() {
3844
  var cache = Event.cache;
3845
 
3846
  function getEventID(element) {
3847
    if (element._prototypeEventID) return element._prototypeEventID[0];
3848
    arguments.callee.id = arguments.callee.id || 1;
3849
    return element._prototypeEventID = [++arguments.callee.id];
3850
  }
3851
 
3852
  function getDOMEventName(eventName) {
3853
    if (eventName && eventName.include(':')) return "dataavailable";
3854
    return eventName;
3855
  }
3856
 
3857
  function getCacheForID(id) {
3858
    return cache[id] = cache[id] || { };
3859
  }
3860
 
3861
  function getWrappersForEventName(id, eventName) {
3862
    var c = getCacheForID(id);
3863
    return c[eventName] = c[eventName] || [];
3864
  }
3865
 
3866
  function createWrapper(element, eventName, handler) {
3867
    var id = getEventID(element);
3868
    var c = getWrappersForEventName(id, eventName);
3869
    if (c.pluck("handler").include(handler)) return false;
3870
 
3871
    var wrapper = function(event) {
3872
      if (!Event || !Event.extend ||
3873
        (event.eventName && event.eventName != eventName))
3874
          return false;
3875
 
3876
      Event.extend(event);
3877
      handler.call(element, event);
3878
    };
3879
 
3880
    wrapper.handler = handler;
3881
    c.push(wrapper);
3882
    return wrapper;
3883
  }
3884
 
3885
  function findWrapper(id, eventName, handler) {
3886
    var c = getWrappersForEventName(id, eventName);
3887
    return c.find(function(wrapper) { return wrapper.handler == handler });
3888
  }
3889
 
3890
  function destroyWrapper(id, eventName, handler) {
3891
    var c = getCacheForID(id);
3892
    if (!c[eventName]) return false;
3893
    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
3894
  }
3895
 
3896
  function destroyCache() {
3897
    for (var id in cache)
3898
      for (var eventName in cache[id])
3899
        cache[id][eventName] = null;
3900
  }
3901
 
3902
  if (window.attachEvent) {
3903
    window.attachEvent("onunload", destroyCache);
3904
  }
3905
 
3906
  return {
3907
    observe: function(element, eventName, handler) {
3908
      element = $(element);
3909
      var name = getDOMEventName(eventName);
3910
 
3911
      var wrapper = createWrapper(element, eventName, handler);
3912
      if (!wrapper) return element;
3913
 
3914
      if (element.addEventListener) {
3915
        element.addEventListener(name, wrapper, false);
3916
      } else {
3917
        element.attachEvent("on" + name, wrapper);
3918
      }
3919
 
3920
      return element;
3921
    },
3922
 
3923
    stopObserving: function(element, eventName, handler) {
3924
      element = $(element);
3925
      var id = getEventID(element), name = getDOMEventName(eventName);
3926
 
3927
      if (!handler && eventName) {
3928
        getWrappersForEventName(id, eventName).each(function(wrapper) {
3929
          element.stopObserving(eventName, wrapper.handler);
3930
        });
3931
        return element;
3932
 
3933
      } else if (!eventName) {
3934
        Object.keys(getCacheForID(id)).each(function(eventName) {
3935
          element.stopObserving(eventName);
3936
        });
3937
        return element;
3938
      }
3939
 
3940
      var wrapper = findWrapper(id, eventName, handler);
3941
      if (!wrapper) return element;
3942
 
3943
      if (element.removeEventListener) {
3944
        element.removeEventListener(name, wrapper, false);
3945
      } else {
3946
        element.detachEvent("on" + name, wrapper);
3947
      }
3948
 
3949
      destroyWrapper(id, eventName, handler);
3950
 
3951
      return element;
3952
    },
3953
 
3954
    fire: function(element, eventName, memo) {
3955
      element = $(element);
3956
      if (element == document && document.createEvent && !element.dispatchEvent)
3957
        element = document.documentElement;
3958
 
3959
      var event;
3960
      if (document.createEvent) {
3961
        event = document.createEvent("HTMLEvents");
3962
        event.initEvent("dataavailable", true, true);
3963
      } else {
3964
        event = document.createEventObject();
3965
        event.eventType = "ondataavailable";
3966
      }
3967
 
3968
      event.eventName = eventName;
3969
      event.memo = memo || { };
3970
 
3971
      if (document.createEvent) {
3972
        element.dispatchEvent(event);
3973
      } else {
3974
        element.fireEvent(event.eventType, event);
3975
      }
3976
 
3977
      return Event.extend(event);
3978
    }
3979
  };
3980
})());
3981
 
3982
Object.extend(Event, Event.Methods);
3983
 
3984
Element.addMethods({
3985
  fire:          Event.fire,
3986
  observe:       Event.observe,
3987
  stopObserving: Event.stopObserving
3988
});
3989
 
3990
Object.extend(document, {
3991
  fire:          Element.Methods.fire.methodize(),
3992
  observe:       Element.Methods.observe.methodize(),
3993
  stopObserving: Element.Methods.stopObserving.methodize(),
3994
  loaded:        false
3995
});
3996
 
3997
(function() {
3998
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
3999
     Matthias Miller, Dean Edwards and John Resig. */
4000
 
4001
  var timer;
4002
 
4003
  function fireContentLoadedEvent() {
4004
    if (document.loaded) return;
4005
    if (timer) window.clearInterval(timer);
4006
    document.fire("dom:loaded");
4007
    document.loaded = true;
4008
  }
4009
 
4010
  if (document.addEventListener) {
4011
    if (Prototype.Browser.WebKit) {
4012
      timer = window.setInterval(function() {
4013
        if (/loaded|complete/.test(document.readyState))
4014
          fireContentLoadedEvent();
4015
      }, 0);
4016
 
4017
      Event.observe(window, "load", fireContentLoadedEvent);
4018
 
4019
    } else {
4020
      document.addEventListener("DOMContentLoaded",
4021
        fireContentLoadedEvent, false);
4022
    }
4023
 
4024
  } else {
4025
    document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
4026
    $("__onDOMContentLoaded").onreadystatechange = function() {
4027
      if (this.readyState == "complete") {
4028
        this.onreadystatechange = null;
4029
        fireContentLoadedEvent();
4030
      }
4031
    };
4032
  }
4033
})();
4034
/*------------------------------- DEPRECATED -------------------------------*/
4035
 
4036
Hash.toQueryString = Object.toQueryString;
4037
 
4038
var Toggle = { display: Element.toggle };
4039
 
4040
Element.Methods.childOf = Element.Methods.descendantOf;
4041
 
4042
var Insertion = {
4043
  Before: function(element, content) {
4044
    return Element.insert(element, {before:content});
4045
  },
4046
 
4047
  Top: function(element, content) {
4048
    return Element.insert(element, {top:content});
4049
  },
4050
 
4051
  Bottom: function(element, content) {
4052
    return Element.insert(element, {bottom:content});
4053
  },
4054
 
4055
  After: function(element, content) {
4056
    return Element.insert(element, {after:content});
4057
  }
4058
};
4059
 
4060
var $continue = new Error('"throw $continue" is deprecated, use "return" instead');
4061
 
4062
// This should be moved to script.aculo.us; notice the deprecated methods
4063
// further below, that map to the newer Element methods.
4064
var Position = {
4065
  // set to true if needed, warning: firefox performance problems
4066
  // NOT neeeded for page scrolling, only if draggable contained in
4067
  // scrollable elements
4068
  includeScrollOffsets: false,
4069
 
4070
  // must be called before calling withinIncludingScrolloffset, every time the
4071
  // page is scrolled
4072
  prepare: function() {
4073
    this.deltaX =  window.pageXOffset
4074
                || document.documentElement.scrollLeft
4075
                || document.body.scrollLeft
4076
                || 0;
4077
    this.deltaY =  window.pageYOffset
4078
                || document.documentElement.scrollTop
4079
                || document.body.scrollTop
4080
                || 0;
4081
  },
4082
 
4083
  // caches x/y coordinate pair to use with overlap
4084
  within: function(element, x, y) {
4085
    if (this.includeScrollOffsets)
4086
      return this.withinIncludingScrolloffsets(element, x, y);
4087
    this.xcomp = x;
4088
    this.ycomp = y;
4089
    this.offset = Element.cumulativeOffset(element);
4090
 
4091
    return (y >= this.offset[1] &&
4092
            y <  this.offset[1] + element.offsetHeight &&
4093
            x >= this.offset[0] &&
4094
            x <  this.offset[0] + element.offsetWidth);
4095
  },
4096
 
4097
  withinIncludingScrolloffsets: function(element, x, y) {
4098
    var offsetcache = Element.cumulativeScrollOffset(element);
4099
 
4100
    this.xcomp = x + offsetcache[0] - this.deltaX;
4101
    this.ycomp = y + offsetcache[1] - this.deltaY;
4102
    this.offset = Element.cumulativeOffset(element);
4103
 
4104
    return (this.ycomp >= this.offset[1] &&
4105
            this.ycomp <  this.offset[1] + element.offsetHeight &&
4106
            this.xcomp >= this.offset[0] &&
4107
            this.xcomp <  this.offset[0] + element.offsetWidth);
4108
  },
4109
 
4110
  // within must be called directly before
4111
  overlap: function(mode, element) {
4112
    if (!mode) return 0;
4113
    if (mode == 'vertical')
4114
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
4115
        element.offsetHeight;
4116
    if (mode == 'horizontal')
4117
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
4118
        element.offsetWidth;
4119
  },
4120
 
4121
  // Deprecation layer -- use newer Element methods now (1.5.2).
4122
 
4123
  cumulativeOffset: Element.Methods.cumulativeOffset,
4124
 
4125
  positionedOffset: Element.Methods.positionedOffset,
4126
 
4127
  absolutize: function(element) {
4128
    Position.prepare();
4129
    return Element.absolutize(element);
4130
  },
4131
 
4132
  relativize: function(element) {
4133
    Position.prepare();
4134
    return Element.relativize(element);
4135
  },
4136
 
4137
  realOffset: Element.Methods.cumulativeScrollOffset,
4138
 
4139
  offsetParent: Element.Methods.getOffsetParent,
4140
 
4141
  page: Element.Methods.viewportOffset,
4142
 
4143
  clone: function(source, target, options) {
4144
    options = options || { };
4145
    return Element.clonePosition(target, source, options);
4146
  }
4147
};
4148
 
4149
/*--------------------------------------------------------------------------*/
4150
 
4151
if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
4152
  function iter(name) {
4153
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
4154
  }
4155
 
4156
  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
4157
  function(element, className) {
4158
    className = className.toString().strip();
4159
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
4160
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
4161
  } : function(element, className) {
4162
    className = className.toString().strip();
4163
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
4164
    if (!classNames && !className) return elements;
4165
 
4166
    var nodes = $(element).getElementsByTagName('*');
4167
    className = ' ' + className + ' ';
4168
 
4169
    for (var i = 0, child, cn; child = nodes[i]; i++) {
4170
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
4171
          (classNames && classNames.all(function(name) {
4172
            return !name.toString().blank() && cn.include(' ' + name + ' ');
4173
          }))))
4174
        elements.push(Element.extend(child));
4175
    }
4176
    return elements;
4177
  };
4178
 
4179
  return function(className, parentElement) {
4180
    return $(parentElement || document.body).getElementsByClassName(className);
4181
  };
4182
}(Element.Methods);
4183
 
4184
/*--------------------------------------------------------------------------*/
4185
 
4186
Element.ClassNames = Class.create();
4187
Element.ClassNames.prototype = {
4188
  initialize: function(element) {
4189
    this.element = $(element);
4190
  },
4191
 
4192
  _each: function(iterator) {
4193
    this.element.className.split(/\s+/).select(function(name) {
4194
      return name.length > 0;
4195
    })._each(iterator);
4196
  },
4197
 
4198
  set: function(className) {
4199
    this.element.className = className;
4200
  },
4201
 
4202
  add: function(classNameToAdd) {
4203
    if (this.include(classNameToAdd)) return;
4204
    this.set($A(this).concat(classNameToAdd).join(' '));
4205
  },
4206
 
4207
  remove: function(classNameToRemove) {
4208
    if (!this.include(classNameToRemove)) return;
4209
    this.set($A(this).without(classNameToRemove).join(' '));
4210
  },
4211
 
4212
  toString: function() {
4213
    return $A(this).join(' ');
4214
  }
4215
};
4216
 
4217
Object.extend(Element.ClassNames.prototype, Enumerable);
4218
 
4219
/*--------------------------------------------------------------------------*/
4220
 
4221
Element.addMethods();