Event.observe(window, 'load', function(){ 
	
	$$('.navbut').each(function(item){
		var tmp = item.getStyle('backgroundImage');
		item.observe('mouseover',function(){			

			item.firstDescendant().next().setStyle({
  			display: 'block'
			});

		})
		item.observe('mouseout',function(){			

			item.firstDescendant().next().setStyle({
  			display: 'none'
			});
		})
		
	})


})