menueHover = function() {
        var mhItem0 = document.getElementById("topNav").getElementsByTagName("LI");
        for (var i=0; i<mhItem0.length; i++) {
                mhItem0[i].onmouseover=function() {
                        this.className+=" menueHover";
                }
                mhItem0[i].onmouseout=function() {
                        this.className=this.className.replace(new RegExp(" menueHover\\b"), "");
                }
        }
}
if (window.attachEvent) window.attachEvent("onload", menueHover);