Trigger Javascript when closing browser window from CP8

I worry this isn't possible but here goes....any help would be incredible.
Recently I was given some great advice on how to trigger a Javascript action in the frame on our LMS which the Captivate file plays in.
It works perfectly and on the final page triggers the Javascript which send usage back to the LMS and forward the user to a page which allows them to rate the course.
The code was as follows:
top.code.closeSCOContent();
closeSCOContent() is something written into our LMS.
However the obvious issue occurs when a user just closes the browser window and for some reason our LMS doesn't record any bookmarking or any data.
The only way it seems to do this is if that function is called.
So using the window.onunload() or the DOFinish; function is there a way I can edit any file in the Captivate output to trigger this function when closing the browser?
Long shot I know but currently the best I have managed is getting the course to trigger this as soon as it loads rather than closing the window?
Massive thanks in advance for any advice.

Any solution to ensure the data is written back to the LMS would solve the issue.
Currently when the close button is pressed nothing happens at all and it's a big problem.
Triggering this .closeSCOContent() function would be the ideal, but if it's not possible anything to write back would be best.
When you say <body onbeforeunload="top.code.closeSCOContent();">
Do you mean putting this in the HTML file of the output which currently is:
<body bgcolor="#f2f2f2">
and change this to:
<body onbeforeunload="top.code.closeSCOContent();" body bgcolor="#f2f2f2">

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nehcdet wrote:
> Like most of the use of swf, my swf is embedded in an
html. I'm wondering if I
> can catch the event in my swf when user browses away
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Trigger Javascript when closing browser window from CP8

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