how to detect a page unload via closing a window

From	zephyr <marc.at.compass@gmail.com>
Newsgroups	comp.lang.javascript
Subject	how to detect a page unload via closing a window
Date	2012-03-28 08:00 -0700
Organization	http://groups.google.com
Message-ID	<4192865.8.1332946844959.JavaMail.geo-discussion-forums@vbuf25> (permalink)

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Hi,

I want an alert to appear when the user closes a browser window. That is easy enough - onBeforeUnload fires before unloading the window. But I want that alert only to show when the user leaves the page by closing the window: clicking the little x in the tab or top-right/left (Mac) of the window.
I don't want this alert to show when the user leaves the page by clicking a next button (since that is a legitimate pageunload). Also when he does a refresh, I don't want this alert to show up. OnBeforeUnload fires at all events when the current page is unloaded, be it from a close box click, a refresh or simply a redirect to another page.

Hope my question is clear...

Is there a way to do what I want?

Marc

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how to detect a page unload via closing a window zephyr <marc.at.compass@gmail.com> - 2012-03-28 08:00 -0700
  Re: how to detect a page unload via closing a window David Mark <dmark.cinsoft@gmail.com> - 2012-03-28 20:19 -0700

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