I find an article which tells how we can simplify ajax applications using jquery. jQuery is a JavaScript library that helps simplify the JavaScript and Asynchronous JavaScript + XML (Ajax) programming. Unlike similar JavaScript libraries, jQuery has a unique philosophy that allows us to express common complex code succinctly.
Learn about the jQuery philosophy, discover its features and functions, perform some common Ajax tasks, and find out how to extend jQuery with plug-ins from the following link : How easy the Ajax and DOM scripting