Memo: XMLHttpRequest object tutorials

When I first tried a simple Ajax to create a MP3 device catalog last year, I used Apple's demo site that helped me to get started:

• XMLHttpRequest Object Demo (by Apple)

I found these articles by IBM this year and read partially:

• Mastering Ajax, Part 1: Introduction to Ajax
• Mastering Ajax, Part 2: Make asynchronous requests with JavaScript and Ajax
• Mastering Ajax, Part 3: Advanced requests and responses in Ajax
• Mastering Ajax, Part 4: Exploiting DOM for Web response
• Mastering Ajax, Part 5: Manipulate the DOM
• Mastering Ajax, Part 6: Build DOM-based Web applications

I will read later:

• 60 More AJAX Tutorials