Ajax Mistakes
AJAX is an awesome technology that is driving a new generation of web apps, from maps.google.com to colr.org to backpackit.com. But Ajax is also a dangerous technology for web developers, its power introduces a huge amount of UI problems as well as server side state problems and server load problems. Javascript itself is a dangerous UI technology, but here is the list to problems particular to Ajax development.
http://swik.net/Ajax/Ajax+Mistakes
Moreover you can now add your own mistakes or edit this list on “SWiK - Ajax Mistakes“.
So , Read is before starting your AJAX based application.