$(document).ready(function(){  
    

	$("ul#main_navigation li").hover(function() {
		
		//Drop down the subnav on hover
		$(this).find("ul.subnav").slideDown('fast').show(); 
    
		$(this).hover(function() {  
        }, function(){  
              $(this).find("ul.subnav").slideUp('fast'); //When the mouse hovers out of the subnav, move it back up  
          });  
    

          }).hover(function() {  
              $(this).addClass("subhover");
          }, function(){
              $(this).removeClass("subhover");
     });  
    
 });