sfHover = function() {
	if (document.getElementById("nav"))
  {
    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);
}