tiling backgrounds

I would like to use one large graphic as a background. Its size at the
moment is 640 x 480 pixels. How can I stop this from tiling? And is the
size universal enough for the various browsers?

Thanks.


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Mr Kim Lehman,
Business & Development Manager
Department of Management
University of Tasmania, Australia
Phone: +61 (0)3 6324 3330
Fax: +61 (0)3 6324 3369
Mobile: 0417 346 833
e-mail: Kim.Lehman(at)utas.edu.au
website: http://www.comlaw.utas.edu.au/management/
(check out my web-published novel - http://www.vision.net.au/rainbow)
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