Ajax Cross Domain Calls

Question

Can we make Ajax request to a different instance of server(different port) running on the same machine

Answer 1

Different port means different domain for the browser. So you will hit the cross-domain barrier.

Like Stuart said, you could try using JSONP.

If you are using jQuery, I'd recommend http://code.google.com/p/jquery-jsonp/ if you want it to be as painless as possible.