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+=" hover";
        }
    node.onmouseout=function() {
    this.className=this.className.replace(" hover", "");
    }
   }
  }
 }
}
window.onload=startList;