title: Back and previous button in website
body: <p>I am beginner for java,  My  project contains two web pages one is login page and other is main page which has three frames with logout button,When i click on log out it will again go to page which ask the user to login . but after sign out when i click previous button available on browser it is going to the main page ,What exactly has to be done to stop accessing the data once after log-out.
  Please help me out</p>
  
  <p>Thanks in Avance</p>
  
  <p>Regards,
  Akhila</p>