title: Can response code be accessed from parent window?
body: <p>If I run <code>window.open(..)</code> is it possible to get response code of this new window request?</p>
  
  <p>I wan't to download file from separate service in separate window, but the service can response with 200, 404 and 409. I need to properly handle this response code in main window.</p>
  
  <p>Also if there is any cross browser solution?</p>