$(document).ready(function() {

  $('#slided').slider({
    vertical: true,
    speed: 70000
  });
  
  $(".megabutton").mouseover(function() {
    $(this).css({"background-position" : "0px 160px"});
  });
  $(".megabutton").mouseout(function() {
    $(this).css({"background-position" : "0px 0px"});
  });

});