monitoring user input in a window

[stefan karos]

Is it possible to have a javascript monitor the text input by a user to any all all browser windows that are open?
From this, it seems not:
http://docstore.mik.ua/orelly/webprog/jscript/ch13_11.htm

if the 'monitoring window' is spawned by the parent, then I suppose you could capture the text being typed in the parent. How could I know if this is happening?

[Frinavale]

You can use the window.opener property to call JavaScript methods across parent/child browser windows.