$(document).ready(function(){
    $('a.menu').mouseover(function() {
        $(this).stop().animate({
            backgroundPosition: '0px -81px'
            },300)
    });
    $('a.menu').mouseout(function() {
        $(this).stop().animate({
             backgroundPosition: '0px 26px'   
            },300)
    });
    
 });