The Spry framework for Ajax from Adobe Labs is a JavaScript library that provides easy-to-use yet powerful Ajax functionality that allows designers to build pages that provide a richer experience for their users. It is designed to take the complexity out of Ajax and allow designers to easily create Web 2.0 pages.

The Spry framework is a way to incorporate XML, JSON or HTML data into pages using HTML, CSS, and a minimal amount of JavaScript. The Spry framework is HTML-centric, and easy to implement for users with basic knowledge of HTML, CSS and JavaScript. The framework was designed such that the markup is simple and the JavaScript is minimal. By building the front-end of your web application with Spry you enable a more efficient designer-developer workflow by keeping UI separated from back-end application logic. You can view the demos and samples created by Spray.

Demo: http://labs.adobe.com/technologies/spry/demos/