Finding Ajax Post URL Without Access to Source

How can I find the POST URL for a form that's being posted using ajax (action handlers are in PHP, but I doubt that matters too much in this case)?

Problem is I need to find out using an alternate method as I don't 开发者_如何学Pythonhave access to the source.

if you can run the page, you could check with Live HTTP Headers or fiddler to see where the POST is going...

What do you mean you don't have access to the source? If the JavaScript Ajax call is executed, then you probably do have access to the code. It's probably just a bit tricky to find.

Use firebug to understand which request is happening.