一个S2SH框架下的入门程序，有简单的登录注册功能，并能进行下载，本程序只是为熟悉S2SH框架所作，结构十分简单-S2SH entry under the fr a mework of a program, a simple login registration feature, and can be downloaded, the procedure is made familiar with S2SH fr a mework, the structure is very simple