Ajax (asynchronous JavaScript and XML), or AJAX, is a group of interrelated web development techniques used for creating interactive web applications or rich Internet applications. With Ajax, web applications can retrieve data from the server asynchronously in the background without interfering with the display and behavior of the existing page
http: / / en.wikipedia.org / wiki / AJAX
This free pdf guide teaches you how to implement efficient client-server communications when heavy realtime communication is needed.
http: / / www.mathertel.de / AjaxEngine / documentation / AspectsOfAjax.pdf
These are the top 20 Ajax effects that every web developer should know. They're essential parts of any web developer's toolbox.
http: / / nettuts.com / web-roundups / 20-excellent-ajax-effects-you-should-know /
This list of tutorials is a combination of the original list on AjaxPatterns.org and Max Kiesler's list of 30 tutorials
http: / / ajaxpatterns.org / Tutorial_Links
Asynchronous JavaScript and XML (Ajax), is arguably the most popular new Web technology. In this two-part "Developing PHP the Ajax way" series, you will create a simple photo album as an online Web application, entirely in PHP and the Simple Ajax Toolkit (Sajax). You'll begin by writing a simple photo album using the standard method of PHP development and later apply Sajax to make it an active Web application.
http: / / www.ibm.com / developerworks / xml / library / os-php-rad1 /
These pattern(s) are the building blocks of Ajax applications. They are more "reference patterns" than true "design patterns", at least from the perspective of a modern Ajax developer, who will take these technologies as a given. The patterns are included to introduce the types of technologies that are used, provide a common vocabulary used throughout the language, and facilitate a discussion of pros and cons.
http: / / ajaxpatterns.org / Patterns
This mini-book is an additional resource for AJAX and PHP: Building Responsive Web
Applications (Packt Publishing, 2006).
http: / / www.cristiandarie.ro / ajax-php / PDFs / 1825_whiteboard_Final.pdf