// JavaScript Document
startList = function(which_menu) {

if (document.all&&document.getElementById) {
navRoot = document.getElementById(which_menu);
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", "");
   }
   }
  }
 }
 if(which_menu !="nav"){
 startList("nav");
 }
}

window.onload=startList("top_nav");