javascript - force image cache

I have a image intensive project that I would like to cache the images.

I tried preloading in one of the slideshows, but it still doesn't 
cache... well, actually, some viewers cache everything (good) some cache
nothing(very bad) so the preloading script I've used isn't really doing 
anything.  I guess my question is.... can I force the images to cache 
and save everyone (especially myself) a little stress?

The site I'm referring to is http://www.collateralassets.com.  It's
getting heavy hits, and I have great hopes it will grow.  I would feel
much more confident about maintaining this long-term if I could ease the
burden on my server.

Many thanks.

Regards,
Deb King




=====
websites:
http://www.collateralassets.com
http://www.markszine.com
http://www.pasttentspress.org

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