/**
 * Onload handler for fancy dropdowns in top nav.
 *
 * Applies hover behavior to all divs with class "expando", the expanded 
 * item must be a child element with class "expando-panel".
 *
 * Requires hover intent jquery plugin.
 *
 */
 
$(function() {

   var hoverConfig = {    
        sensitivity: 2, 
        interval: 100, 
        over: openNav,
        timeout: 150, 
        out: closeNav
   };
   
   function openNav(){  
      $(this).addClass("header-nav-on");
      $(this).find(".expando-panel").slideToggle("fast");
   }
   
   function closeNav(){ 
      $(this).find(".expando-panel").slideToggle("fast", function(){$(this).parent().removeClass("header-nav-on")});
   }
   
   $("div.expando").hoverIntent(hoverConfig);

});