Problem with multiple AJAX requests at once?

That's the question. Is there any problem with running more than one at once, or should you nest them so that one is called as the previous one is completed?

It should work just fine. That's what the request tags are for - so you can tell apart different requests. However, the responses could arrive in a completely different order to the way you made the requests, so don't code anything expecting A to come back first, then B, then C etc.