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;