[Seaside] A countdown in ajax

[Alberto Bacchelli]

Hi,

  I am trying to implement a sort of questionnaire.
There is one question per "page" (each page is simply
a div element that is rendered or not), and each page
has a time limit.

This means that I would like to show an ajax countdown in the
page, and I want to automatically change the page when the
time expires.

I have no idea on how to implement this,
since in my opinion it would involve a separate
thread that takes care of the timing issue.
And I wouldn't know what's the way to deal with
threads in seaside.

Do you have any pointer/suggestion for me?

Thank you,
  Alberto