How to pop up a message box and redirect when someone closes a window?

How do I do it?
I saw this salespage: bustliars.com
When I close the window, a message box appears and I'm being redirected to the discount
page.. how do I do it?

 

You add:

onbeforeunload="return ExitPage();"

PHP:

to your body element as an attribute.

ExitPage() is this script:

var ShowExitPopup = true;



function ExitPage()

{

if (ShowExitPopup) 

{ 

ShowExitPopup = false;

location.href = "http://www.bustliars.com/discount.html";



return '*************************************************\nToday only Special $20 OFF Discount\n*************************************************\n\nI want to offer you a special discount I normally only offer to my friends and family.\n\nYou can get $20 OFF by clicking the CANCEL button below.\n\nYou will get the entire system for only $19.99 \n\nTo get instant access to my special  discount page where you can use the $10 OFF discount code you MUST click on the CANCEL button below.\n\n*************************************************\nTodays Special $20 OFF Discount\n*************************************************\n';

}

}

PHP:

 

I hate when it happens to me, but it is a good way to drive traffic