Is it possible to refresh region at specific intervals or event based?

I have bunch of regions on a page. Instead of refreshing the entire page every 5 minutes, I would like refresh certain regions every 5 minutes. Also is it possible to refresh the regions based certain events?. For example, If the region is tracking tasks for a user, whenever someone creates a task for the user, is it possible refresh that tasks region only in the event task creation?. an ideas are appreciated.
Thanks for your help,
Surya

Hi,
Use "region pull" method and then javascript timer
http://apex.oracle.com/pls/otn/f?p=11933:48
Even guide is for "pulling" report, same can be do to any HTML content
Br,Jari

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