Simple AJAX Implementation using XMLHTTPRequest

Today, i did a small application that selects an image from the server as requested by the user and displays it on the screen. Has an ajax implementation though the same can be implemented in pure javascript. But this shows some of the limitless possibilities by using the xmlhttprequest API! Click on the below link to get a preview of it.
http://www.thiya.net/ajax/

Planning to do my E-greetings website completely based on AJAX. But I have a lot more to learn!! My sincere Thanks to Prabhu Anna for his continuous support and encouragement!!