Datatables row grouping - how to add rowcount per group and expand/collapse all

Question

I am using Datatables Collapsible/Expandable Grouping. http://jquery-datatables-row-grouping.googlecode.com/svn/trunk/collapsibleGroups.html

I have configured it so

Answer 1

    $(document).ready(function () {
                $('#example').dataTable({
                    "bLengthChange": false,
                    "bPaginate": false,
                    "bJQueryUI": true
                }).rowGrouping({
                    bExpandableGrouping: true,
                    bExpandSingleGroup: false,
                    iExpandGroupOffset: -1,
                    asExpandedGroups: [""]
                });

                GridRowCount();
            });

            function GridRowCount() {
                $('span.rowCount-grid').remove();
                $('input.expandedOrCollapsedGroup').remove();

                $('.dataTables_wrapper').find('[id|=group-id]').each(function () {
                    var rowCount = $(this).nextUntil('[id|=group-id]').length;
                    $(this).find('td').append($('<span />', { 'class': 'rowCount-grid' }).append($('<b />', { 'text': rowCount })));
                });

                $('.dataTables_wrapper').find('.dataTables_filter').append($('<input />', { 'type': 'button', 'class': 'expandedOrCollapsedGroup collapsed', 'value': 'Expanded All Group' }));

                $('.expandedOrCollapsedGroup').live('click', function () {
                    if ($(this).hasClass('collapsed')) {
                        $(this).addClass('expanded').removeClass('collapsed').val('Collapse All Group').parents('.dataTables_wrapper').find('.collapsed-group').trigger('click');
                    }
                    else {
                        $(this).addClass('collapsed').removeClass('expanded').val('Expanded All Group').parents('.dataTables_wrapper').find('.expanded-group').trigger('click');
                    }
                });
            };


// ------------ Css -------------------------//
       .rowCount-grid
        {
            float: right;
            font-size: 15px;
            color: Red;
            padding-right: 250px;
        }