sfHover = function() {
	var hover_elements = $("#header li");
	for (var i = 0; i < hover_elements.length; i++) {
		hover_elements[i].onmouseover = function() {
			this.className += " sfhover";
		}
		hover_elements[i].onmouseout = function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}