title: Google API: Authorized JavaScript Origins
body: <p>I'm implementing a Google+ Sign-In for our web service, and stumbled on "Authorized JavaScript Origins". Our clients have web addresses either as a sub-domain of our main domain, or as a custom domain name. Since the login page is under that sub-domain (or custom domain), and in order to make the Google+ Sing-In button work, that custom domain/sub-domain should be (manually) entered in the "Authorized JavaScript Origins" list (with both http and https).</p>
  
  <p>Does anybody know a way to do that automatically (through some API maybe)?
  If not, then how do you do it?</p>