disabling printing of web pages?

Hello,
Maybe someone is able to help me:
How would you keep people away from printing a web page pushing the 
browser's print button or via the pop up menu after RMC?
I know it is easily possible with a screen shot. But I have web pages with 
highly compressed JPG photos and I offer my customers and friends CD-ROMs 
with these photos as high quality TIF files.
Nevertheless they start printing the pages and are complaining about the 
bad quality. Since these people are inexperienced users they don't know 
about screen shots and would rather order a (free!!) CD when simple 
printing is impossible.
Does one of you gurus know a HTML command or Java script?
TIA

Chris

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Christoph Niemann <C.Niemann(at)gmx.net>

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