function keepAlive() {

  var newdiv = document.createElement('div');
  newdiv.setAttribute('id', 'idKeepAlive');
  newdiv.style.width = 1;
  newdiv.style.height = 1;
  newdiv.style.position = "absolute";
  newdiv.style.left = 0;
  newdiv.style.right = 0;  
  document.body.appendChild(newdiv);
  //new Ajax.PeriodicalUpdater({success: 'idKeepAlive'}, sJsR+'processor.php', {method: 'post', parameters: 'action=keepalive', frequency: 900}); 

  return;
}

//Event.observe(window, 'load', function () {keepAlive();}, false);