(function($){

        //cache nav
        var nav = $("#mainMenu");

        //add indicator and hovers to submenu parents
        nav.find("li").each(function() {
                if ($(this).find("ul").length > 0) {
                        $("<span>").text("̌").appendTo($(this).children(":first"));

                        //show subnav on hover
                        $(this).mouseenter(function() {
                                $(this).find("ul").stop(true, true).slideDown();
                        });

                        //hide submenus on exit
                        $(this).mouseleave(function() {
                                $(this).find("ul").stop(true, true).slideUp();
                        });
                }
        });
})(jQuery);