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jquery - Popup before window is closed

I want to open a custom popup box when browser close button is pressed, I want to ask a question to the users exiting that why are they leaving my site. I have checked quite few posts but the best thing I found is something like this post

http://stackoverflow.com/questions/10847156/jquery-dialog-box-before-closing-browser-window

But this just opens a browser default confirm box. I want to open a custom box like colorbox. My page is http://cwstudio.in/browserclose/

right now I am using alert function to open the popup but if I donot use the alert, the browser donot waits for my popup and just close it.

Any help is appreciated.

Thanks

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by (71.8m points)

You can use the javascipt window.onunload or jquery unload method:

Javascript:

 window.onunload = function(){
 //Do something
 }

Jquery:

 $(window).unload(function(){
 //Do something
 });

Update: If the user has blocked pop-ups then you can not do anything. However you can use a confirm box instead of showing popup:

var r = confirm("Are you sure you want to leave?");

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