Auto refresh control

I have 3 repeat controls on an XPage. The top repeat shows ‘incoming’ requests. Obviously I don’t want the user to have to keep hitting ‘Refresh’ to see if anything has come in, and I don’t want to use tag to refresh the whole page every X seconds. How would I go about having just the one repeat control do a partial refresh automatically every X seconds? Not sure how or where to code.

Thanks in advance for any help.