sfHover = function() {
	$$("#navigation li").each( function(nav) {
		nav.addEvent( 'mouseover' ,function(e) {
			this.toggleClass("sfhover");
		});
		nav.addEvent('mouseout', function(e) {
			this.toggleClass("sfhover");
		});
	});
	
}
window.addEvent('load', sfHover);