AJAX: Highly Interactive Web Applications

AJAX stands for Asynchronous JavaScript and XML. AJAX presents new challenges to the development process. Testing is complicated by offloading a good portion of the web application to the client side. Since the web developer has little control over which client is used, strict adherence to web standards and testing with many clients is necessary. Developers must also face learning and testing JavaScript, XML, CSS, XHTML, and the browser DOM, in addition to whatever server side language they choose to use.