title: Pass document.ready() of iframe to parent container
body: <p>Is there a way to pass the <code>document.ready()</code> of an iframe to the parent container?</p>
  
  <p>My scenario is this:</p>
  
  <p>External content is shown in an iframe in a Shadowbox. The shadowbox overlay (<code>#sb-overlay</code>) has a background with a loading icon. I now would like to remove the loading icon, when the content in the iframe has completely loaded.</p>
  
  <p>Thanks!</p>