public function index_onDelete()
 {
     if (($checkedIds = post('checked')) && is_array($checkedIds) && count($checkedIds)) {
         $plural = 'y';
         if (count($checkedIds) > 1) {
             $plural = 'ies';
         }
         foreach ($checkedIds as $categoryId) {
             if (!($category = Category::find($categoryId))) {
                 continue;
             }
             $category->delete();
         }
         Flash::success('Categor' . $plural . ' Successfully Deleted.');
     }
     return $this->listRefresh();
 }