Detect Window Close

after making a call to window.open
i would like to detect when the popUp window is closed

i have a Close button on the screen
so onClick, it will detect

but if the user click on the Close in the titlebar,
my code doesnt account for that

i have given the window a name,
eg, newPopUp
and tried checking for the existence of the window
but it doesnt seem to work…..

eg. when opening the window

[CODE]window.open(‘pop21.htm’,’cam1′,’width=640,height=550,scrolling=no,titlebar=no’)
winClosed=true
top.frames[‘camera1’].location.href = “about:blank”[/CODE]

and closing

[CODE]function winClose() {
opener.top.camera1.location = ‘test21.htm’
window.close()
}[/CODE]

[CODE]if (winClosed==true && !cam1) {
top.camera1.location = ‘test21.htm’
}[/CODE]

the winClose function is fine
but it will not detect if the window is closed through the X on the titlebar

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