$(document).ready(function() {
  //When trigger is clicked...
  $("#a_tab5").mouseover(function() {
    //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"  
  });
});