说明：  主要实现影音出租登记、出租更改、出租删除、库存查询这四个功能模块。当用户或会员租借影音资料时进行租借登记；当租借登记发生错误应进行租借更改；当归还时进行租借登记删除；当要查询租界影音的情况时可进行租借查询。作为音像出租来说，主要实现音像资料添加、音像删除、音像修改、音像资料汇总这四个功能模块。当企业购入一张新的音像资料时，可进行音像资料添加，以便用户能及时租借相关影音资料；当音像资料过时或丢失是时，管理员可以及时对音像资料库相关信息进行删除；当影音资料输入有误时，需要对资料进行修改等
(main video rental registration, changes in rental, lease deleted, inventory inquiry that four functional modules. When the user or member when renting audio-visual materials for loan registration; When the lease should be registered for the error occurred lease changes; When the time for the return of leased register; For 1945 when the video can be rented at the inquiry. As audio and video rental, the main audio-visual information to add, delete audio, video and revised summary of audiovisual information that four modules. When the enterprise purchased a new audio-video data, audio and video information can be added, so users can lease timely information related to video; When the audio-visual information is outdated or lost, administrators can pair of timely audiovisual database related i)