Ajax Foundations
on-line-reading: http://book.csdn.net/bookfiles/11/
download: http://download.csdn.net/source/247299
Ajax in action:
on-line-reading: http://book.csdn.net/bookfiles/13/
download : http://download.csdn.net/source/219562
Ajax Hacks-Oreilly出版新书，并附有源代码下载
源代码下载：http://www.parkerriver.com/ajaxhacks/ajax_hacks_js.zip