$(document).ready(function(){  
     
      
   $(".about_btn").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(100).show(); //Drop down the subnav on click  
    
      $(this).parent().hover(function() {  
        }, function(){  
      $(this).parent().find("ul.subnav").slideUp(100); //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"  
       });  
     });