popup window programmaticall

Question

It is possible to create popup window with JavaScript and when it id closed detect whether it was closed by user by clicked [X] or by internal JavaScript function? something like,

var win = window.open("someurl", "popup", "");
var pollTimer = window.setInterval(function() {
    if (win.closed !== false) { 
        window.clearInterval(pollTimer);
        detectCloseMethodFunction();
    }
}, 200);

Answer 1

You could try:

confirm("My popup!");

This would create a browser popup and you can check for the answer.

Check here for more information: http://www.w3schools.com/jsref/met_win_confirm.asp

Answer 2

The only relevant events for this question are onunload & onbeforeunload. But still you cannot detect the pressing of the [X] button of the window through them.