Chrome notifications as taken from http://stackoverflow.com/questions/2271156/chrome-desktop-notification-example

notification.html

<script>
function notify() {
  var havePermission = window.webkitNotifications.checkPermission();
  if (havePermission == 0) {
    // 0 is PERMISSION_ALLOWED
    var notification = window.webkitNotifications.createNotification(
      'http://i.stack.imgur.com/dmHl0.png',
      'Chrome notification!',
      'Here is the notification text'
    );

    notification.onclick = function () {
      window.open("http://stackoverflow.com/a/13328397/1269037");
      notification.close();
    }
    notification.show();
  } else {
      window.webkitNotifications.requestPermission();
  }
}  
</script>

<div style="width: 300px; height: 300px; background: yellow" onclick="notify()">
Cick here to notify
</div>