Float centered a page - now absolute position images is off

[ImperialCommand]

My page started out as left justified with an important image positioned absolute in the upper right corner.
I put the entire page into a div #container box with left/right margins set to auto and text set to "center".
That centered the page.
The next <div> was another container that held the entire page contents with text set to "left".

So the page is centered on screen and everything is normal except the one important image which was positioned "absolute" as a layer.
It, of course, stayed where it was told to.

(Think of a postage stamp on an envelope). The image needs to be in the upper right corner without pushing other images away.
How do I get it to position?
Any pointers?

[penders]

Your #container div needs to have

position:relative

- then any absolutely positioned elements within this #container will be positioned relative to the #container and not the body, which is what seems to be happening at the moment.

[ImperialCommand]

Thank you so very much!
You're advice was 100 percent accurate.
The page is now centered and the absolute position images align perfectly.