$(document).ready(function(){   
  
    $("ul.subnav").parent().append("<span></span>"); //only shows drop down trigger when js is enabled (adds empty span tag after ul.subnav*)   
  
    $("ul.topnav li a").mouseover(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"   
    });   
  
});