sfHover = function() { 

	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);