$(function(){
	$('.top_menu a')
		.css( {backgroundPosition: "50% -49px"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"(50% 0px)"}, {duration:400})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"(50% -49px)"}, {duration:400, complete:function(){
				$(this).css({backgroundPosition: "50% -49px"})
			}})
		})
		
		

});

$(function(){
	$('.button')
		.css( {backgroundPosition: "0px 0px"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"(-300px 0px)"}, {duration:350})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:500, complete:function(){
				$(this).css({backgroundPosition: "0px 0px"})
			}})
		})
});