sfHover = function() {
	var sfEls = document.getElementById('navigation').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);