sfHover = function() {
  var sfEls = document.getElementById("portal-globalnav").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);