sfHover = function() {
            var sfEls = document.getElementById("drop").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);