* Wrap a method with extended functionality, preserving the original function * @param {Object} obj The context object that the method belongs to *

* Wrap a method with extended functionality, preserving the original function * @param {Object} obj The context object that the method belongs to *

* 查询 * @param string $sql * @return mixed */

* 上传错误检查 * @param $errCode * @return string */

----------------------------------------------------------------------

* Displays an alert. * @param {String} str String to display.

* Displays an alert. * @param {String} str String to display.