sfHover = function() {
    // specify hovered element and div in which it sits 
    var sfEls = document.getElementById("content").getElementsByTagName("ul");
	for (var i=0; i<sfEls.length; i++) {
        sfEls[i].onmouseover=function() {
            this.className+=" hover";
        }
        sfEls[i].onmouseout=function() {
            this.className=this.className.replace(new RegExp(" hover\\b"), "");
        }
    }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);