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