$(document).ready(function () { 

  // Hover drop-downs
  $('#header_right li ul').stop().animate({"opacity":1}, "fast");
  $('#header_right li ul').stop().animate({"opacity":0}, "fast");

  $("#header_right ul > li").hover(function(){
    $(this).find("ul").css('display', 'block').stop().animate({"opacity":1}, "fast");
  }, function(){
    $(this).find("ul").css('display', 'none').stop().animate({"opacity":0}, "fast");
  });
  
});