title: mraid.close() doesn't work after submit a form
body: <p>I have a mraid ad which includes a form for the user to submit his phone number.
  the form is submitting via a post action to another page on my site.</p>
  
  <p>The problem is, after the user clicks on the submit and sends the form, the new page that renders has no access to the mraid object, so when i later call mraid.close(); , nothing happens.</p>
  
  <p>Is there a clever solution to this?</p>
  
  <p>(i want to be able to close the add also after the form is submitted)</p>
  
  <p>Thanks.</p>