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