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;