一个简单的在线购物系统，实现分为前台展示与后台管理，前台有商品展示，后台有用户后台跟管理员后台-A simple online shopping system, front display and the background is divided into management, future merchandise display, the background a user with administrator background background

实现了购物车的全选 全不选 选中删除 选中状态下数量增加时总价随之增加等基本功能-Realized the full don t choose shopping cart selection of selected to delete the selected state of the basic function such as quantity increase when the price will increase