navHover = function() {
        var menus = document.getElementById("navbar").getElementsByTagName("ul");
        for (var i=0; i<menus.length; i++) {
                menus[i].className+=" clearfix";
        }
        var lis = document.getElementById("navbar").getElementsByTagName("li");
        for (var i=0; i<lis.length; i++) {
                lis[i].onmouseover=function() {
                        this.className+=" sfhover";
                }
                lis[i].onmouseout=function() {
                        this.className=this.className.replace(new RegExp("sfhover\\b"), "");
                }
        }
}
//if (window.attachEvent) window.attachEvent("onload", navHover);