$(document).ready(function(){   
     
        $("ul.topnav li a.dropdown").hover(function() { //When trigger is clicked...   
      
            //Following events are applied to the subnav itself (moving subnav up and down)   
            $(this).parent().find("ul.subnav").slideDown('fast').show(); //Drop down the subnav on click   
      
            $(this).parent().hover(function() {   
            }, function(){   
                $(this).parent().find("ul.subnav").slideUp('slow'); //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"   
        });   
      
    });