var myrules = {
	'#menu li' : function(el){
		el.onmouseover = function(){
			this.setAttribute("class", "hov");
			this.setAttribute("className", "hov");
		}
		el.onmouseout = function(){
			this.setAttribute("class", null);
			this.setAttribute("className", null);
		}
	}
};

Behaviour.register(myrules);