I tried to use some online resources. All of them covers this much:

1. How to create xmlHttpRequest in cross-browser fashion.
2. How to define onreadystatechange function
3. how to call open and send
4. how to receive and use responsetext and responsexml
5. how to do the server side thing in php/asp

I wonder how to learn more beyond that.

Besides without having any work experience in AJAX, how can I gather the expert level knowledge that would make me start right away at the next assignment at the next job?

Thanks in advance.

These problems have been solved by others. Use jQuery or one of the other javascript libraries. If your interest is primarily the learning process, read the jQuery (or other) source code. Stand on the shoulders of giants.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.