[Zope] presenting partial page

[Dilley, Hara]

I have an application that asks users to fill in a form.  Users fill in =
and submit the form which it takes a few minutes to be processed.
While is being processed the users still see the form and not the =
uncompleted page that displays the results.
I would like to be able to present to the users a message like "This =
action will take a few minutes to be completed --Please wait"
What is the best way of accomplishing that?

TIA
Hara