$(document).ready(function(){  
      
      $("ul.topnav li a").hover(function() { //When trigger is clicked...  
      
            //Following events are applied to the subnav itself (moving subnav up and down)  
            $(this).parent().find("ul.subnav").fadeIn('fast').show(); //Drop down the subnav on click  
      
           $(this).parent().hover(function() {  
           }, function(){  
               $(this).parent().find("ul.subnav").fadeOut('fast'); //When the mouse hovers out of the subnav, move it back up  
           });  
     
           //Following events are applied to the trigger (Hover events for the trigger)  
           }).hover(function() {  
               $(this).addClass("subhover"); //On hover over, add class "subhover"  
           }, function(){  //On Hover Out  
               $(this).removeClass("subhover"); //On hover out, remove class "subhover"  
       });  
     
   });