sfHover = function() {

		if ( document.getElementById("nav") != null)
   		{
   			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"), "");
   				}
	   		}
	   	}
}