navHover = function() {
         var lis = document.getElementById("navmenu").getElementsByTagName("LI");
         for (var i=0; i<lis.length;i++) {
             lis[i].onmouseover=function() {
                      this.className+=" iehover";
             }
             lis[i].onmouseout=function() {
                   this.className=this.className.replace(new RegExp(" iehover\\b"), "");
             }
         }
}
if (window.attachEvent) window.attachEvent("onload", navHover);