title: Lightbox iframe close
body: <p>I have a button inside Lightbox iframe. How to close that iframe by clicking that button?</p>
  
  <p>My code looks like this:  </p>
  
  <pre><code>&lt;p:lightBox id="posetastavkeListaLightBox" 
              widgetVar="posetastavkeListaLightBoxWidget" 
              iframe="true" width="900px" height="700px"&gt;          
  &lt;/p:lightBox&gt;
  </code></pre>