Ajax Library

http://www.webmasterworld.com/javascript
http://developer.mozilla.org/en/docs/Category:AJAX
http://www.w3.org/TR/XMLHttpRequest/
http://www.dhtmlgoodies.com/
http://getahead.ltd.uk/
http://www.lukew.com/resources/articles/ajax_design.asp
http://ajaxpatterns.org/