//second level nav subpanel drop down menu timeout
$(function() {
    $("ul.panel_button_list li").hover(function() {
      var timeout = $(this).data("timeout");
      if(timeout) clearTimeout(timeout);
      $(this).find("ul.subpanel_button_list").slideDown('fast');
    }, function() {
        $(this).data("timeout", setTimeout($.proxy(function() {
            $(this).find("ul.subpanel_button_list").slideUp();
        }, this), 500));
    });
    $(document).click(function() {
        $('ul.subpanel_button_list:visible').hide();
    });
});