I have a form, and a submit handler in jQuery.
When the user submits the form, I want to modify (add) some parameters to the POST request, before it is despatched fr
I don't think you can modify the POST vars that way. When a submit handler runs there's no hash of the form data that really exists that you can add to or modify. I think you're right - your only options to $.post() yourself (which I'd recommend) or to append hidden inputs to the form (has the overhead of DOM modification which you don't really need).