Image in margin

[fanhockeycoach]

I want to put a picture along the margins on my site. Is there a way to keep the main body of my page centered no matter how big the window is? if i set the margin to picture size then the main content doesn't stay center, if i leave it to auto margin then the main body is centered but then the image in the margin gets moved behind body. help

site is fhahockey.com or pgfirefighters.ca

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also is there a way to get the same image on both sides of the margin?

[Attitude5ire]

You can center your background image.
in your doc_background just center it using top center