Hi - I'm using the Ajax Upload to allow users to upload files onto the server using a web form interface.  In the interface, I have the button with which the user selects a file, which uploads automatically after the file is selected.  I would like to fire javascript when the upload begins, but without requiring a manual start to the upload.  Is it possible to hook when the upload begins (or, when the file is successfully selected) without doing the manual upload?

P.S., I should also ask - is it possible to hook javascript onto when the user cancels the upload, too? 

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