4. XMLHttpRequest Quirks and PHP
This short tutorials discusses some aspects of using XMLHttpRequest and gives you some tips how to avoid common problems.
5. Alternate Ajax Techniques, Part 1
Most articles on Ajax have focused on using XMLHttp as the means to achieving such communication, but Ajax techniques aren't limited to just XMLHttp. There are several other methods; we'll explore some of the more common ones in this series of articles.
6. Quick Guide to Prototype
The tutorial explains the most common methods used in Particletree projects with simple examples of how to implement them.
10. Cross-Browser Event Handling and Memory Leaks
In this article, the author discusses how organize the cross-browser event handling and avoid most common problems with memory leaking
