Thanks Peter, that might be a little beyond me at that point. I'll give it a shot though, see if I can figure out how to apply that to my page. Here is the link to it: http://seismic.ath.cx/
depending on the time of day (night) if might be unavailable. Anyway, all the graphics are layed out with tables, and the text is an absolutely positioned div... you'll understand right away that I'm in a bit of trouble if I center the table-aligned graphics to the page width -- the text won't move with the graphics.
Again, I'll check out the link but having taken a look at my page can you think of another solution not involving the complex math?