Posting form question

I have a basic form with a submit button and a few textfields that submits information. There is also a place where the users profile image appears and there is an option to change it. When the user clicks on ‘Change Image’, I would like everything in the form to save and the user be sent to the change image page.

Basically when the user clicks submit I want the form to post to one file, but if they click on change image it posts somewhere else all in the same form.