title: Get current logged in facebook userId
body: <p>This is close to the question asked <a href="https://stackoverflow.com/questions/5846752/facebook-get-users-facebook-uid-with-javascript">Getting an Facebook user profile data with Javascript</a> here, but I am not looking to interface at all with anything more than the publically available facebook API info.  For example, if you navigate to <a href="http://graph.facebook.com/ericfusciardi" rel="nofollow noreferrer">http://graph.facebook.com/ericfusciardi</a>  you will see my public facebook id, and public name supplied to facebook -- no credential or API token required.</p>
  
  <p>Is there a way to obtain the current logged in username OR userid without needing to create an "app" in facebook and registering the SDK / jump through all its API hoops [ which only seems relevent to apps wanting to dig deeper than public info ]?  My plugin is only interested in the public information.  Is the ID/name stored in a cookie or something?  If so, where can it be reliably located?</p>