It's not supposed to be. In fact, in quite a few browsers, it isn't
possible, due to the potential for for malicious activity this ability
raises.
However, if you google this, I'm sure you will find out that IE exposes a
loophole: assigning any string to the window.opener property fools IE into
thinking the script that is running is the script that opened the window.
In the next version of IE this loophole will be closed.
Bob Barrows
--
Microsoft MVP - ASP/ASP.NET
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