“Head Rush Ajax (Head Rush Ajax)”:http://www.oreilly.com/catalog/headra/ is meant for those developers/designers who

* knows html, css and javascript but not yet a guru
* want to learn, understand and remember ajax
* want to talk cool things about ajax to other people

Ajax apps are asynchronous, which means that the javascript talks to the web server asynchronously – javascript makes a request to the server, but you can still type in web forms, and even click buttons – all while the we server is still working in the background. When the server is done, your code can update just that part of the page that’s changed. I like their comments about code comments. In an effort to save programmers time and prevent confusion, code fragments are marrying their comment counterparts across the globe, providing love, companionship and self-documentation for all.

Just like any other Head First, Head Rush series, this book is very illustrative, aimed at beginner to intermediate developers and is very easy to understand. It has a bunch of examples with a diverse explanation of the codes including javascript functions, methods usage and html elements, _et al_.