startList = function() {
   if (document.all&&document.getElementById) {
     navRoot = document.getElementById("nav");
     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", "");
         }
       }
     }
    }
  }
  window.onload=startList;