Open popup by a form's submit button?

[eluser]Unknown[/eluser]
After a bit of seesaw changes and jQuery debauchery I decided to use the standard form action, let the POST data be processed by a controller function, which saves the results in the session's userdata and opens yet another controller function in a popup, which grabs the data from the session, phew!

Not too straightforward but works like a charm without me pondering about AJAX for the time being.

lupida