$(function(){
	$('#MenuPrincipal a')
		.css( {backgroundPosition: "-2px 0px"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"(-800px 0px)"}, {duration:500})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:500, complete:function(){
				$(this).css({backgroundPosition: "-2px 0px"})
			}})
		})

	$('#MenuSecundario a')
		.css( {backgroundPosition: "3px 0px"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"(-746px 0px)"}, {duration:500})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"(3px 0px)"}, {duration:500, complete:function(){
				$(this).css({backgroundPosition: "3px 0px"})
			}})
		})

});