function MultiSelect(instance,el,tableClass,noneText,max_limit){this.max_limit=max_limit?max_limit:0;if(!noneText)noneText="";this.instanceName=instance;tbl=document.createElement("table");tbl.className=tableClass;this.tBody=document.createElement("tbody");tbl.appendChild(this.tBody);this.select=document.createElement("select");this.select.name=el.name;selected=new Array();if(noneText!=""){opt=document.createElement("option");opt.value="";opt.innerHTML=noneText;this.select.appendChild(opt);}
for(i=0;i<el.options.length;i++){if(el.options[i].selected)selected[selected.length]=i+1;opt=document.createElement("option");opt.value=el.options[i].value;opt.innerHTML=el.options[i].innerHTML;this.select.appendChild(opt);}
this.addLink=document.createElement("a");this.addLink.className="add";this.addLink.innerHTML="<span>+</span>";this.addLink.href="#";this.removeLink=document.createElement("a");this.removeLink.className="remove";this.removeLink.innerHTML="<span>&minus;</span>";this.removeLink.href="#";this.tr=document.createElement("tr");this.tr.appendChild(document.createElement("td"));this.tr.appendChild(document.createElement("td"));this.tr.appendChild(document.createElement("td"));this.tr.childNodes[0].appendChild(this.select);this.tr.childNodes[1].appendChild(this.addLink);this.tr.childNodes[2].appendChild(this.removeLink);if(selected.length>0){for(var i=0;i<selected.length;i++){this.addRow(false,selected[i]);}}else this.addRow(false,false);el.parentNode.replaceChild(tbl,el);el.optionLimit=0;}
MultiSelect.prototype.tBody;MultiSelect.prototype.select;MultiSelect.prototype.optionLimit;MultiSelect.prototype.removeRow=function(rowIndex){if(this.tBody.childNodes.length>1){this.tBody.removeChild(this.tBody.childNodes[rowIndex]);}
this.refreshNames();}
MultiSelect.prototype.addRow=function(insertAfter,selectedIndex){if(this.max_limit>0&&this.tBody.childNodes.length>=this.max_limit){return;}
tr=this.tr.cloneNode(true);if(selectedIndex!=false){tr.childNodes[0].childNodes[0].selectedIndex=selectedIndex;}
if(this.optionLimit>0&&this.optionLimit<=this.tBody.childNodes.length)return;if(insertAfter===false||this.tBody.childNodes.length==0||insertAfter==(this.tBody.childNodes.length-1)){this.tBody.appendChild(tr);}
else{this.tBody.insertBefore(tr,this.tBody.childNodes[insertAfter+1]);}
this.refreshNames();}
MultiSelect.prototype.refreshNames=function(){for(var i=0;i<this.tBody.childNodes.length;i++){this.tBody.childNodes[i].childNodes[0].childNodes[0].name=this.select.name+"["+i+"]";this.tBody.childNodes[i].childNodes[1].childNodes[0].onclick=new Function(this.instanceName+".addRow("+i+",false);return false;");this.tBody.childNodes[i].childNodes[2].childNodes[0].onclick=new Function(this.instanceName+".removeRow("+i+");return false;");}}
MultiSelect.prototype.setSelected=function(selected){for(var i=(this.tBody.childNodes.length-1);i>=0;i--){this.tBody.removeChild(this.tBody.childNodes[0]);}
for(i=0;i<selected.length;i++){this.addRow(false,0);this.tBody.childNodes[i].childNodes[0].childNodes[0].value=selected[i];}}
MultiSelect.prototype.setOptionLimit=function(limit){this.optionLimit=limit;}