title: Chrome extension content script and document.ready event
body: <p>My content-script defined to run on each and every page.<br>
  I encountered a problem with Facebook:<br>
  suppose I load "<a href="http://facebook.com" rel="nofollow">http://facebook.com</a>", my content script runs and I can tell it because the event: $(document).ready() get fired. then, I press a link inside facebook (my profile page, or group I belong to), but the content script does not loaded again.  </p>
  
  <p>It's weired because the url is changing, so the content script should run again, isn't it?  </p>