How to disable Refresh,Reload in browser and user should not allow to multiple browser sessions ?

Question

Dear All,
How to disable Refresh,Reload in browser and end user should not allow to multiple browser sessions in portal.Where we need to configure the settings or any code in masthead or any other component. My server version is 7.4 - SP5 .Please help us.
Thanks for advance,
BR,
Durga Rao.

Answer 1

Dear all,
i am able to logoff the click refresh button on keyboard.I am using this code to log off the user into the portal.
document.onkeydown = function(e)
  var key;
  if (window.event) key = event.keyCode
  else
  var unicode = e.keyCode ? e.keyCode : e.charCode
  key = unicode
  switch (key)
  { //event.keyCode
  case 116: //F5 button
    LSAPI.sessionPlugin.logoff();
  event.returnValue = false;
  key = 0; //event.keyCode = 0;
  return false;
  case 82: //R button
  if (event.ctrlKey)
LSAPI.sessionPlugin.logoff();
  event.returnValue = false;
  key = 0; //event.keyCode = 0;
  return false;
  case 91: // ctrl + R Button
LSAPI.sessionPlugin.logoff();
  event.returnValue= false;
  key=0;
  return false;
Thanks.
But i am unable to control the multiple windows opening the browser.So any one can tell me the how to block the new window and new tab/duplicate tab option.
BR,
Durga Rao.