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4 david 1 
/*
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  Author: Justin Whitford
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  Source: www.evolt.org
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*/
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function filtery(pattern, list){
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  /*
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  if the dropdown list passed in hasn't
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  already been backed up, we'll do that now
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  */
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  if (!list.bak){
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    /*
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    We're going to attach an array to the select object
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    where we'll keep a backup of the original dropdown list
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    */
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    list.bak = new Array();
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    for (n=0; n<list.length; n++){
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      list.bak[list.bak.length] = new Array(list[n].value, list[n].text);
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    }
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    bakselected = list.selectedIndex;
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  }
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  /*
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  We're going to iterate through the backed up dropdown
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  list. If an item matches, it is added to the list of
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  matches. If not, then it is added to the list of non matches.
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  */
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  match = new Array();
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  nomatch = new Array();
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  if (pattern.length != 0) {
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	  for (n=0; n<list.bak.length; n++){
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		if(list.bak[n][1].toLowerCase().indexOf(pattern.toLowerCase())!=-1 || list.bak[n][0] == pattern ){
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		  match[match.length] = new Array(list.bak[n][0], list.bak[n][1]);
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		}else{
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		  nomatch[nomatch.length] = new Array(list.bak[n][0], list.bak[n][1]);
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		}
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	  }
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  }
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  /*
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  Now we completely rewrite the dropdown list.
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  First we write in the matches, then we write
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  in the non matches
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  */
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  if (match.length > 0) {
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	  list.options.length = match.length;
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	  for (n=0; n<match.length; n++){
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		list[n].value = match[n][0];
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		list[n].text = match[n][1];
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	  }
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    list.selectedIndex=0;
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  }
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  else {
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	  list.options.length = list.bak.length;
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	  for (n=0; n<list.bak.length; n++){
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		list[n].value =  list.bak[n][0];
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		list[n].text =  list.bak[n][1];
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	  }
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  list.selectedIndex = bakselected;
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  }
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}