function delete($id)
 {
     global $webdb;
     //print_r($this->permCheck && !permission::check($this->tableName,'d_tag'));exit;
     if ($this->tableName && $this->permCheck && !permission::check($this->tableName, 'd_tag')) {
         permission::errMsg();
         return false;
     }
     return $webdb->query("delete from " . $this->tableName . " where " . $this->key . "='" . $id . "'");
 }