Detect Browser tab closed.

[Jack]

$(document).ready(function() { 
  window.onunload = afterUnload;
});

function afterUnload() {
    params  = 'width='+screen.width;
    params += ', height='+screen.height;
    params += ', top=0, left=0'
    params += ', fullscreen=yes';
    window.open('/Thanks.aspx', '_newtab', params);
    window.focus();
}

For now i able to detect the browser close and redirect the user to other pages.
I am using ASP.NET to build my website, and i have multiple child pages under the same master page.
The problem i faced is whenever i swift to another child page (under the same master page) will redirect me to go Thanks.aspx page.
Any tricks suggested to avoid this happening? I just want whenever the user is closing the browser/tab only will redirect to the Thanks.aspx page, but not redirect whenever user trying to go another child pages.

Thanks for in advanced.

[__]

I suggest not doing this at all.

If someone wants to leave your website, opening a popup instead will only upset them.

[Jack]

i doing this because my Thanks.aspx having remove cookies.
if possible then i want detect user close tab but not redirect to another child pages, then remove cookies code will be fired.
How can i do that?

[Jack]

Does anyone know how to achieve my requirement?
Thanks for in advanced.

[Author]

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