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