In addition to all of the other useful classes Prototype gives to developers, it also provides a number of classes and methods for development of Ajax-enabled web applications. That is, it allows developers to easily perform HTTP sub-requests using XmlHttpRequest and to handle the response accordingly. In this article I will show you how Prototype makes Ajax development for developers by covering the functionality it provides. Additionally, I will show you how to easily transfer data between your JavaScript code and web server using JSON data.