startList = function() {
   if (document.all && document.getElementById) {
      navRoot = document.getElementById("nav").childNodes[0];
      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;