var dropDown_id = "nav"

initDropDown = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById(dropDown_id);
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
  }
  node.onmouseout=function() {
  this.className=this.className.replace(" over", "");
   }
   }
  }
 }
}

/*
function addEvent(objObject, strEventName, fnHandler) { 
 // DOM-compliant way to add an event listener 
 if (objObject.addEventListener) 
   objObject.addEventListener(strEventName, fnHandler, false); 
 // IE/windows way to add an event listener 
 else if (objObject.attachEvent) 
   objObject.attachEvent("on" + strEventName, fnHandler); 
}
*/
EventUtils.addEventListener(window,'load',initDropDown);