Constructing Usable Shopping Carts"" Creating a usable e-commerce application is a daunting challenge. There is so much to do, from the initial concept, through to designing and coding the application. This leaves a lot of scope for things to go wrong. In this book, we take all the hassle out of online shopping applications, by showing you how to plan your application, design the user interface and data store, and code the entire thing. But it doesnt stop there &emdash; we provide the full code for two complete shopping cart applications, customizable for your own needs.