ajax下拉列表框做的无刷新省市联动，包括数据库-drop-down list box to do ajax without refreshing the linked cities, including the database

ajax技术，(动态加载列表框,option选项带value值)，例如当你选择某某院系，其班级选项就弹出来-ajax technology (dynamic load list box, option value option with value), such as when you choose certain departments, the class option to pop up

ExtJS实现的用户管理界面,实现了用户的增加功能、修改功能、删除功能、查看工程。还提供了下拉列表选择框进行年龄的选择功能。-ExtJS achieve user management interface the ExtJS to achieve the user management interface the ExtJS to achieve the user interface the ExtJS to achieve the user management interface the E