title: facebook autologin authentication
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/3348543/check-if-user-is-logged-in-new-facebook-api">Check if user is logged in New Facebook API</a>  </p>
  </blockquote>
  
  
  
  <p>ive implemented facebook login intergration within my site. everything works as should. except that, i want a script to know if someone is logged into facebook, to have the option to autologin. lemme give you a better example, go to <a href="http://bit.ly/iaUiEf" rel="nofollow noreferrer">http://bit.ly/iaUiEf</a> when logged into facebook. it will popup this feature. is this an fb feature?</p>