$(document).ready(function() {

  // dropdown nav
  $('#nav-main ul').superfish({ 
    delay:       1000,                            // one second delay on mouseout 
    animation:   {opacity:'show',height:'show'},  // fade-in and slide-down animation 
    speed:       'fast',                          // faster animation speed 
    autoArrows:  false,                           // disable generation of arrow mark-up 
    dropShadows: true                            // disable drop shadows 
  });

});