title: how to obtain scope information for facebook login button?
body: <p>I created a facebook login button from here:
  <a href="http://developers.facebook.com/docs/reference/plugins/login/" rel="nofollow">http://developers.facebook.com/docs/reference/plugins/login/</a></p>
  
  <p>and I have the following login button:</p>
  
  <pre><code> &lt;div class="fb-login-button" scope="email" data-show-faces="true" data-max-rows="3"&gt;Login with Facebook&lt;/div&gt;
  </code></pre>
  
  <p>So, when the user accept the permissions, how can I get the user information (in this case the email)? (Using javazcript in client-side)</p>