function sfHover(id)
{
	var sfEls = document.getElementById(id).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"), "");
		}
	}
}