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);