I have written a custom dashboard that displays my open trouble tickets and the statuses of hosts and services in Nagios. I have set it to refresh every minute. Up to this point, I have been using meta refreshes and bouncing back and forth between two pages. The first page is the dashboard itself and the second is a page that is identical with the exception of a graphic showing that the page is being refreshed. I'd like to spiff the page up a little bit and have only one page that refreshes every minute and while it is doing all of the refreshing of the statuses, have it display an image or some text to signify that it is refreshing.
In case it matters, the page is written in PHP and is hosted on IIS 6.0. I also have an existing onLoad in my body tag to show a clock.