Close all child windows when parent window is closed

use this

var popup = window.open("popup.html", "popup", "width=200,height=200");

window.onunload = function() {
    if (popup && !popup.closed) {
        popup.close();
    }
};

If you open all child windows with window.open, include this javascript in all pages, then CloseAll(false); from any included page will close all child, grandchildren, great-grand... etc., and redirect the first (root) page to login.aspx, and will not interfere with any event triggers because it pases the intial handler through.

function CloseAll(bTopFound)
{
    if (!bTopFound && nParent != null && !nParent.closed) {
        //parent window was not closed
        nParent.CloseAll(false);
        return;
    } else {
        if (nParent == null || nParent.closed)
        {
            top.location = '/login.aspx';
        }
    }

    for (var i = 0; i < Windows.length; i++)
    {
        if (!Windows[i].closed) {
            Windows[i].CloseAll(true);
        }
    }
    nParent = null;
    setTimeout(window.close, 150);
}

var Windows = [];
//override window.open to inject store child window objects
window.open = function (open) {
    return function (url, name, features) {
        // set name if missing here
        name = name || "default_window_name";
        var newWindow = open.call(window, url, name, features);
        Windows.push(newWindow);
        return newWindow;
    };
}(window.open);

var nParent = null;
window.onload = function (load) {
    return function (e) {
        nParent = window.opener;
        if (load != null) {
            load.call(e);
        }
    }
}(window.onload);

window.onunload = function (unload) {
    return function (e) {
        //promote first branch page to parent
        if (nParent != null && !nParent.closed && Windows.length > 0) {
            nParent.Windows.push(Windows[0]);
            Windows[0].nParent = nParent;
        }
        //make first child window new root
        for (var i = 1; i < Windows.length; i++) {
            Windows[i].nParent = Windows[0];
            Windows[0].Windows.push(Windows[i]);
        }
        if (unload != null) {
            unload.call(e);
        }
    }
}(window.onunload);

Found a proper solution (jQuery) that works in the lastest versions of Chrome, Firefox and IE.

Initially wanted to use jQuery $().unload() function (http://api.jquery.com/unload/) but it's deprecated since 1.8 (http://bugs.jquery.com/ticket/11733). Since $().unload() is the shortcut for $().bind('unload', fn), I tried to use the basic one and it worked.

$(window).on('unload', function() {
    closeAll();
});