var Menu = { 
	register : function(){
		var li = El.getElementsByTagName('li',$('navigation'))
		li.each(function(el){
			Event.add(el, 'mouseover', function(){El.addClassName(el, 'hover')});
			Event.add(el, 'mouseout', function(){El.removeClassName(el, 'hover')});
		});
	}
}
if (document.all){
	Event.add(window, 'load', Menu.register);
}