startList = function() {
  if (document.all&&document.getElementById) {
    navRoot = document.getElementById("ul1");
    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;