There are a few special techniques or effects that can spice up just about any web page. These are the top 20 Ajax effects that every web developer should know. They're essential parts of any web developer's toolbox.
The Ajax wildfire makes many people constantly think about what impact it has on other technologies such as Java, Flash and .NET. Are application developers going to switch from other technologies to Ajax? I explored this subject with regard to Flash in my earlier post
What if you are using AJAX requests in application but your server is offline for some reasons? An interesting and unfortunate by-product of AJAX applications is that these applications rely upon the existence of an application server always being available.