$(document).ready(function() {

    //Set css in Firefox (Required to use the backgroundPosition js)
    $('#slide1').css({backgroundPosition: '0px -42px'});
    $('#slide2').css({backgroundPosition: '0px -42px'});
    $('#slide3').css({backgroundPosition: '0px -42px'});
    $('#slide4').css({backgroundPosition: '0px -42px'});
    $('#slide5').css({backgroundPosition: '0px -42px'});
    $('#slide6').css({backgroundPosition: '0px -42px'});
    $('#slide7').css({backgroundPosition: '0px -42px'});
    $('#slide8').css({backgroundPosition: '0px -42px'});

    //Animate the slide
    $(".menuLink").hover(function(){
      $(this).parent().animate({backgroundPosition: '(0px 0px)'}, 500 );
    }, function() {
      $(this).parent().animate({backgroundPosition: '(0px -42px)'}, 500 );
    });
  });