title: How to close current tab and open link in new tab
body: <p>I've created an Online Exam application in Asp.net 4.0 in VS2010 with C#<br/>
  After completion of the Exam, the student gets redirected to <strong>result.aspx</strong> page using <code>Response.Redirect()</code><br/>
  The problem is that if user clicks the back button then again the timer starts and he can change the  answer.<br/>
  I want to close that tab after Exam completion so that the users cannot go back again and open the result in new page.</p>
  
  <p>How can I do that?  </p>