how to know Zerodha Popup Screen is directly closed.

Whenever we click on the cancel/finish button below function is called and we know the screen is closed.

kite.finished(function(status, request_token) {
alert("Finished. Status is " + status);
});

If the window is not closing with the cancel/finish button. If the user is closing directly the window screen. then how can we know whether the user is executing a stock or not.

Please check and let us know.