TypeError: jwertyCode is null about jwerty HOT 4 CLOSED

        // functions for menu short-cuts
        function CloseMenu() {
            menu = $("#menu").data("tMenu");
            menu.close($($("#menu").data("tMenu").element).find('span.t-link', '> li').parent());
        }

        jwerty.key('alt+[a-z],[a-z]', function (e2) {
            //var menu = $("#menu").data("tMenu");
            var a = $('ul#menu > li[accesskey]', 'body')
                .filter(function (t) {
                    return $(this).data("opened") === 1;
                })
                .find('li')
                .filter(function (i) {
                    return jwerty.is($(this).attr('accesskey'), e2.originalEvent, 1);
                });



            var lnk = a.find('> a.t-link')[0];
            window.location = lnk.pathname; //lnk.attr('href');
            return false;
        }, false);


        jwerty.key('alt+[a-z]', function (e) {

            CloseMenu();
            var menu = $("#menu").data("tMenu");
            var a = $('ul#menu > li[accesskey]', 'body').filter(function (i) {
                if ($(this).attr('accesskey').split(',').length === 1) {
                    return jwerty.is($(this).attr('accesskey'), e.originalEvent, 0);
                }
                return false;
            });
            $(a).data("opened", 1);
            //alert(a.attr('accesskey'));
            menu.open($(a));
            return false;
        }, false);

        jwerty.key('Esc', function (e) {
            CloseMenu();
            return false;
        }, false);