title: Showing popup in the new Facebook JavaScript SDK
body: <p>I used to have an <code>href</code> in my website. When users clicked on it, a multi-friend selector showed so they could invite their friends to my website.
  That was done using the following code:</p>
  
  <pre><code> FB.ensureInit(function() {
          var dialog = new FB.UI.FBMLPopupDialog('XXXXXXX', '');
          var fbml = 'Multi-Friend-Selector FBML'
          dialog.setFBMLContent(fbml);
          dialog.setContentWidth(620);
          dialog.setContentHeight(570);
          dialog.show();
      });
  </code></pre>
  
  <p>Now, I'm using the new JavaScript SDK (<a href="http://connect.facebook.net/en_US/all.js" rel="nofollow noreferrer">http://connect.facebook.net/en_US/all.js</a>), but the old methods are not present...<br>
  How can I do it with the new SDK?</p>