title: Warn the user before session timeout
body: <p>I have a web application implemented in <code>Spring MVC</code>, <code>JSP</code>.<br>
  Default session timeout is defined in <code>web.xml</code> is 30 min.  </p>
  
  <p>if user is idle for 25 mins  than I need to show a popup to user with message that <code>Your session is going to be end by 5 min, Please click OK to continue</code>.  </p>
  
  <p>Do we can achieve this using <code>JavaScript</code>, <code>jquery</code> or any other approach?  </p>
  
  <p>Please suggest.  </p>