var Menus = {
  initialize : function() {
    if (document.all&&document.getElementById) {
      navRoot = document.getElementById("tabs");
      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", "");
            }
        }
      }
    }
  }
}