You can do it in one of a few ways.
1) Implementing a timer that refreshes your page (
IFrame
, not the whole page per se) would be one way to do this.
2) The other way would be to plug in a webservice that updates the page at regular interval.
3) Comet offers an extremely new way to keep multiple web pages updated. Start by reading
ASP.NET and Comet: Bringing Sockets Back[
^].