介绍了ajax的异步登陆验证的开发流程，代码详细，是初学者好的学习资料-Introduces asynchronous ajax development process login authentication code in detail, is a good learning materials for beginners

里面是一个基于SSH框架的CRM客户关系管理系统 里面有详细的流程以及权限控制等-There is an SSH-based framework for customer relationship management CRM system, there are details of the process, and access control, etc.