How to check if the browser window is open?

Question

Background:
In my applet, I have 2 buttons: "Open" and "Close".
When "Open" is clicked, I open a URL using:
getAppletContext().showDocument(new java.net.URL("http://server/MyPage.html"), "MyWindow") This works fine.
When "Close" is clicked, I want to close the previously opened browser window. For that, I am using: getAppletContext().showDocument(new java.net.URL("http://server/Close.html"), "MyWindow") In Close.html, I have used JavaScript's self.close() on OnLoad event.
This also works fine, i.e., the previously opened browser window gets closed.
Now the problem:
If the previously opened browser windows is manually closed, then when "Close" button is clicked, a browser window flashes and goes off. To avoid this, I want to detect if the previously opened browser window is still open - before clicking on "Close" button. Is there a way to do this?
thanks and regards,
DAKAMATH

Answer 1

Note that I am using self.close() in onLoad event because I am closing the same window. If the window doesn't exist, it will create (from Java) and close it (from JavaScript). So it flashes. So it is required that I need to check for browser window existance from within Java and not in JavaScript.
thanks and regards,
DAKAMATH