title: leave all the sites after exit the portal?
body: <p>I have the following problem :</p>
  
  <p>I have a web application like a portal to many sites .</p>
  
  <p>When i click a link to a web site on the portal then click <code>Exit</code> to leave the portal ,the window to that site is still there and this is not secure at all because the user could forget to close the browser just after exit the portal .</p>
  
  <p><strong>Note:</strong></p>
  
  <ul>
  <li>The portal is in a specific server .</li>
  <li>the web sites are in different servers .</li>
  </ul>
  
  <hr>
  
  <p>Is there some way to enable me to leave all the pages after click exit button on the portal ?</p>