Moving Beyond the Basics: Scott Isaacs on AJAX Design Patterns:

"Problems that have to be solved [or at the very least considered] include

• How to abstract away browser detection from each page in the application


• How to make the site accessible or at least work on non-Javascript enabled browsers


• How to efficiently manage the number of connections to the server created by the client given the "chattiness" of AJAX applications compared to traditional web applications


• How to reduce the amount of time spent downloading large script files


• How to create permalinks to portions of the application


• How to preserve or at least simulate the behavior of the browser's 'Back' button"