title: Submitting Portion of Form to a Separate Action
body: <p>In my shopping cart for my online store I'd like there to be a checkbox to allow people to opt-in for my newsletter. But the email address for the newsletter needs to be submitted to a separate form action than the shopping cart action. </p>
  
  <p>Is it possible for me to submit part of a form to another action but still submit to the shopping cart form action and render wherever the shopping cart action would take me?</p>