sfHover = function() {
    var menu = document.getElementById("m-menu"); 
    var sfEls = menu.getElementsByTagName("li");
	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"), "");
		}
	}
}
window.onload = sfHover;