(function($) {
    $.fn.extend({
        addCount: function() {
            return $(this).each(function() {
                if ($(this).is('table')) {
                    $('thead th:first, thead td:first', this).each(function() {
                        if ($(this).is('td'))
                            $(this).before('<td rowspan="' + $('thead tr').length + '">#</td>');
                        else if ($(this).is('th'))
                            $(this).before('<th rowspan="' + $('thead tr').length + '">#</th>');
                    });
                    $('tbody td:first-child', this).each(function(i) {
                        $(this).before('<td>' + (i + 1) + '</td>');
                    });
                }
            });
        }
    });
})(jQuery);