window.addEvent('domready', function() {
	
	var btn_array = $$(".link_menu");
	
	btn_array.each(function(el,i){

		var parent = el.getParent();
		
		parent.addEvents({
			'mouseenter': function(){
				this.addClass("mouse_over");
			},
			'mouseleave': function(){
				this.removeClass("mouse_over");
			}
		});
		
		
	})
	
	
});