sfHover = function(){
       var sfEls = document.getElementById("navlbs").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);