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;