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PROPERTY:  Window::closed
window.closed

This property is used to return a Boolean value that determines if a window has been closed. If it has, the value returned is true.

The following code opens a new window and then immediately closes it. The onClick event of the button then calls a function which uses the window.closed property to display the status (open or closed) of the window.

Code:
<INPUT TYPE="Button" NAME="winCheck" VALUE="Has window been closed?" onClick=checkIfClosed()>

newWindow=window.open('','','toolbar=no,scrollbars=no,width=300,height=150')
newWindow.document.write("This is 'newWindow'")
newWindow.close()

function ifClosed() {
document.write("The window 'newWindow' has been closed")
}

function ifNotClosed() {
document.write("The window 'newWindow' has not been closed")
}

function checkIfClosed() {
if (newWindow.closed)
   ifClosed()
else
   ifNotClosed()
}

  


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