$(document).ready(function(){

	$('#menu_items li').each(function(){
	
		$(this).mouseover(function(){
			$(this).children('a').animate({backgroundPosition: '0 -35px'}, 0);
			$(this).children('.subitem').css("visibility","visible");
		});
		$(this).mouseout(function(){
			if(!$(this).is('.current'))
				$(this).children('a').animate({backgroundPosition: '0 0'}, 0);
			
			$(this).children('.subitem').css("visibility","hidden");
		});
		
	});
	
});