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<?php
        ob_start("ob_gzhandler");
        require_once(realpath(dirname(__FILE__) . '/') . '/secret/wp-hashcash.lib');
        
        $field_id = hashcash_random_string(rand(6,18));
        $fn_enable_name = hashcash_random_string(rand(6,18));
?>

addLoadEvent(<?php echo $fn_enable_name; ?>);

function createHiddenField(){
        var inp = document.createElement('input');
        inp.setAttribute('type', 'hidden');
        inp.setAttribute('id', '<?php echo $field_id; ?>');
        inp.setAttribute('name', 'hashcash_value');
        inp.setAttribute('value', '-1');
        
        var e = document.getElementById('<?php echo HASHCASH_FORM_ID; ?>');
    e.appendChild(inp);
}

function addVerbage(){
        var e = getElementsByClass('<?php echo HASHCASH_FORM_CLASS; ?>');
        var p = document.createElement('p');
        p.innerHTML = '<?php echo str_replace("'", "\'", hashcash_verbage()); ?>';
        e[0].appendChild(p);
}

function <?php echo $fn_enable_name;?>(){
        createHiddenField();
        addVerbage();
        loadHashCashKey('<?php 
        echo $_GET['siteurl']; ?>/tools/hashcash/wp-hashcash-getkey.php', '<?php echo $field_id; ?>');
}       

function loadHashCashKey(fragment_url, e_id) {
        var xmlhttp=createXMLHttp();
        var element = document.getElementById(e_id);

        xmlhttp.open("GET", fragment_url, true);
        xmlhttp.onreadystatechange = function() {
                if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                        element.value = eval(xmlhttp.responseText);
                }
        }

        xmlhttp.send(null);
}

function getElementsByClass(searchClass,node,tag) {
        var classElements = new Array();
        if ( node == null )
                node = document;
        if ( tag == null )
                tag = '*';
        var els = node.getElementsByTagName(tag);
        var elsLen = els.length;
        var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
        for (i = 0, j = 0; i < elsLen; i++) {
                if ( pattern.test(els[i].className) ) {
                        classElements[j] = els[i];
                        j++;
                }
        }
        return classElements;
}

function createXMLHttp() {
        if (typeof XMLHttpRequest != "undefined")
                return new XMLHttpRequest();
        
        var xhrVersion = [ "MSXML2.XMLHttp.5.0", "MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0", "MSXML2.XMLHttp","Microsoft.XMLHttp" ];
  
        for (var i = 0; i < xhrVersion.length; i++) {
        try {
                        var xhrObj = new ActiveXObject(xhrVersion[i]);
      return xhrObj;
    } catch (e) { }
  }
  
  return null;
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
                func();
                oldonload();
    }
  }
}