startList = function() {
   if (document.all && document.getElementById) {
       var menuRoot = document.getElementById("Menu");
       for (var i = 0; i < menuRoot.childNodes.length; i++) {
           var node = menuRoot.childNodes[i];
           if (node.nodeName == "LI") {
               node.onmouseover = function() {
                   this.className += " over";
               }
               node.onmouseout = function() {
                   this.className = this.className.replace(" over", "");
               }
          }
       }
   }
}
window.onload = startList;