title: In asp.net site how to prevent multiple logins of same user id?
body: <p>Please guide how to prevent multiple user to be logged in at a time using a user id ?</p>
  
  <p>I searched the internet and found some ways but somehow they do not work in these situations:</p>
  
  <ol>
  <li>If javascript in brower is turned off.</li>
  <li>If user do not click logout and directly close brower.</li>
  </ol>
  
  <p>Please suggest me some way.</p>
  
  <p>thanks</p>
  
  <p>haansi</p>