Dead Center In HTML

Sorry guys if I am posting this on a wrong part of the forum. I’m trying to get my flash movie to play at a dead center of the page. Not horizontally center but also vertically centered. I think pages like that has a cleaner look if a viewer has a higher resolution and its centered on their page. I tried ABSOLUTE MIDDLE on Dreamweaver but finding myself with no luck. Any help is very much appreciated, as always.