$(function(){
	$('.b')
		.css( {backgroundPosition: "0 0"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"(-220px 0)"}, {duration:600})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"(0 0)"}, {duration:400, complete:function(){
				$(this).css({backgroundPosition: "0 0"})
			}})
		})
		
	$('.b1')
		.css( {backgroundPosition: "0 0"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"(-320px 0)"}, {duration:600})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"(0 0)"}, {duration:400, complete:function(){
				$(this).css({backgroundPosition: "0 0"})
			}})
		})
	
		$('.b2')
		.css( {backgroundPosition: "0 0"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"(-440px 0)"}, {duration:600})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"(0 0)"}, {duration:400, complete:function(){
				$(this).css({backgroundPosition: "0 0"})
			}})
		})
});