Browsers make two concurrent AJAX calls at a time to a domain. If you make five AJAX calls, the browser is going to make two calls first, then wait for any one of them to complete and then make another call until all remaining four calls are complete. Moreover, you cannot expect calls to execute in the same order as you make the calls. Here's why:



Here you see, call 3's response download is quite big, and thus takes longer than call 5. So, call 5 actually gets executed before call 3.

So, the world of HTTP is unpredictable.

thnx...