W2UI Framework - Toolbar handler. A button click is handled on the toolbar (target = id of the button, data = the event object)

W2UI Grid Toolbar

jQuery('#grid').w2grid({
            name: 'grid',
            recordsPerPage: 25,
            fixedRecord: false,
            url: '/wp-content/plugins/GarageSoftware/ajax/AjaxLoadOccasions.php',
            show: {
                header: true,
                footer: true,
                toolbar: true
            },
            toolbar: {
                items: [
                    {type: 'check', id: 'history', caption: 'Historie', img: 'icon-page', checked: false}
                ],
                onClick: function(target, data) {
                    if (target == 'history') {
                        var grid = this.owner;
                        grid.postData['history'] = !data.item.checked;
                        grid.load(grid.url);
                    }
                }
            },