title: How to get facebook cookie? (javascript)
body: <p>I'm using javascript for the facebook login, and for posting action. 
  The problem is, if I login on facebook on the page A, I cannot post on a page B because I lost all the facebook information and I have to re-init and to re-log on facebook for posting on a other...
  and I would like have a login page, and after the user could navigate on the website and post from any page.
  Is there a way to fix that by using the cookie? or anything else? I looked for getting back but cookie but I still not find out how... </p>
  
  <p>Thanks</p>