title: Check state of a Facebook like button in web page
body: <p>I want to check the status of Facebook like button on my web page. I want to this completely on client side without querying anything (if possible)</p>
  
  <p>One idea is to check the style of the page. I have seen that there is an  element with class "... like_button_like" or "...like_button_no_like" depending of the status. Is there a way to query this?</p>
  
  <p>As I said, I don't want to delve into querying Facebook for this with FQL or anything else.</p>