startList = function() {
      if (document.all&&document.getElementById) {
          navRoot1 = document.getElementById("nav1");
          navRoot2 = document.getElementById("nav2");
          for (i=0; i<navRoot1.childNodes.length; i++) {
              node1 = navRoot1.childNodes[i];
              if (node1.nodeName=="LI") {
                  node1.onmouseover=function() {
                      this.className+="over";
                  }
                  node1.onmouseout=function() {
                      this.className=this.className.replace("over", "");
                  }
              }
          }
          for (i=0; i<navRoot2.childNodes.length; i++) {
              node2 = navRoot2.childNodes[i];
              if (node2.nodeName=="LI") {
                  node2.onmouseover=function() {
                      this.className+="over";
                  }
                  node2.onmouseout=function() {
                      this.className=this.className.replace("over", "");
                  }
              }
          }
      }
  }
  window.onload=startList;