public function getData($name=NULL) {
		$data = NULL;

		if(isset($this->response_result['data'])) {
			$data = $this->response_result['data'];
		}else {
			return NULL;
		}

		if(isset($name)) {
			if(isset($data[$name])) {
				return $data[$name];
			}
		} else {
			return $data;
		}
	}