Actually, I understand this one a little better. My first answer is still
the same: popups are evil. Take into account that even IE has popup blocking
now. Do you really want to use a popup? If you still think so, then then
next answer is: I think you're confused. You don't "POST to a window". A
POST is a type of request from a browser to a server. Do you mean you want
the response of a request to go to a different browser? Sorry, that doesn't
work, and rightly so. To get the effect you seem to be searching for, you'd
have to include all request parameters as part of the query string to your
URL so it can send a similar request to what was already sent and get a
response itself. But again, popups are very widely regarded as a Bad Idea.