How to add an Exit popup window in MOSS 2007

I need t开发者_Python百科o show an "Exit" popup window in MOSS pages. How can I achieve this?

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• Setup a javascript include for jQuery
• Setup a javascript include file with this code:

var doPopup = true;

$(document).ready(function() {
  $('a').click(function() { doPopup = false; });
  $('form').submit(function() { doPopup = false; });
});
$(window).unload(function() { onUnloadPopup(); });

function onUnloadPopup() { if (doPopup) {// do your window.open here } }

What it does is run the onUnloadPopup everytime the page is exited without clicking either a link or submitting a form. That function can open your exit popup. Be prepared for a lot of issues though. Exit popups are not liked much, browsers will block them and with something as complex as SharePoint you might get some unexpected occurrences..