网上购物书城，分前后台，未登录用户可进行浏览，用户登录后可进行书籍的购买，评论等。后台可以更改用户权限，增加和修改书籍信息。-Bookstores online shopping, minutes before and after Taiwan, the logged in user can browse the user logs on after the purchase of books, reviews, etc. The background can change user permi