说明：  本代码是一个简单的登陆设计，适合联网登陆使用的登陆框，代码将登陆数据传送给服务器，并获取服务器响应信息。文中的密码发送验证过程也是不错的例子。
(the code is a simple design of the landing, the landing for the use of the network landing frame, landing data code will be transmitted to the server, and access to the server to respond to information. Text passwords this validation process is a good example.)