jQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery is designed to change the way that you write JavaScript. It’s the definition from the author of JQuery. And JQuery also a cross browser javascript library, which means write once and run in every browser.There are a lot of other AJAX frameworks out there, such as Prototype, Mootools, Ext library, Google Webtoolkit … Read more...