jQuery(function($){
  $('ul.sf-menu').superfish({ 
      animation:   {height:'show'},  // fade-in and slide-down animation 
      speed:       'fast',                          // faster animation speed 
      autoArrows:  false,                           // disable generation of arrow mark-up 
      dropShadows: false,                            // disable drop shadows 
      onShow: function() { $(this).parent('li').addClass('active'); },
      onHide: function() { $(this).parent('li').removeClass('active'); }
  });
});