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;