passing variables from a popup to a parent window

[w2e]

Is it possible to pass variables from a (php) popup to a (php) parent window. I want to include a popup to select a city and then pass the result of the selection back to the main window.

This might be possible with javascript but I am not sure of the exact syntax and how the result could be picked up by the parent.

 

Thanks

Martin

[Daemonj]

The popup should be a form so just post the results to the parent window and add the appropriate processing code to the parent window.