title: Chrome-extension: Refresh popup.html to a new html page
body: <p>I'm developing a chrome extension and I've got my popup.html which is a login page. I'm wondering.. how would I (on successful login) redirect to a new html page (which is loaded in the area where <code>popup.html</code> was?) e.g When the user clicks the extension icon, <code>popup.html</code> comes up in the box, on successful login that box changes to a new html page other than <code>popup.html</code>.</p>
  
  <p>How would I do this?</p>