sfHover = function() {
	arr = $$(".nav LI").each(function(el) {
		el.addEvent('mouseover', function() {
			this.addClass("sfhover");
		});

		el.addEvent('mouseout', function() {
			this.setStyle("display: none;");
			this.removeClass("sfhover");
			this.setStyle("display: block;");
		});
	});
}
if (window.attachEvent) window.attachEvent("onload", sfHover);