$(window).load(function() {
    $('#menu a:not(.selected)')
    .css( {backgroundPosition: "-20px -57px"} )
    .mouseover(function(){
      $(this).stop().animate(
        {backgroundPosition:"-20px 0"}, 
        {duration:400});
      })
    .mouseout(function(){
      $(this).stop().animate(
        {backgroundPosition:"20px -57px"}, 
        {duration:200, complete: function() {
        $(this).css( {backgroundPosition: "-20px -57px"} );
        }});
      });
    });