title: Open a link to new tab inside a ifame of iframe
body: <p>I have a <code>iframe-1</code> and it contains another <code>iframe-1-1</code>.<sup><strong>[1]</strong></sup><br>
  Inside <code>iframe-1-1</code> which contains a link.<br>
  When a user click the link:</p>
  
  <blockquote>
    <p>It should open a new tab (For instance, Firebug/or Chrome).<sup><strong>[2]</strong></sup>  </p>
  </blockquote>
  
  <p>But it does not work. How can I do that?</p>
  
  <hr>
  
  <p><strong>[1]</strong> Why I have this question: because I code a webpage, it is embedded in Facebook, and I call FB.dialog it will show me a dialog is a iframe too.<br>
  <strong>[2]</strong> It works properly if I use wheel button to click.</p>