AJAX / CSS - How to Handle Bookmarks and Back Buttons

This article presents an open source JavaScript library that finally brings bookmarking and back button support to AJAX applications. By the end of this tutorial, developers will have a solution to an AJAX problem that not even Google Maps or Gmail possesses: robust, usable bookmarking and back and forward behavior that works exactly like the rest of the Web.
http://www.onjava.com/lpt/a/6293