实现了网上选课系统，通过该系统，学校不同角色的用户可以通过网路完成选课系统功能：管理员通过该系统实现对学生、教师、课程的添加和维护和学生成绩的维护；教师通过该系统实现查看课程选修情况和录入学生成绩；学生通过该系统实现选课、退课等功能；还有公有模块：修改密码功能。-Online course system, the adoption of the system, the role of schools of different network users can complete the course through the system: the system administrator through the achievement of students, teachers, courses and students to add and maintain the performance of maintenance　teachers See courses in the elective system and the recording student achievement　students through the system classes, class features such as retirement　also public modules: Change Password function.