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.

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

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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.