Help on Handheld CSS

[kdjuiopo]

I've designed a site in PHP. I want to use CSS for handheld devices. How can I test it on my PC? And how a single CSS can suit most of the handheld devices. Do I need to compress the images used in background or do I need to create new images entirely for such devices? Very confused.

[rajmv]

http://www.opera.com/mobile/demo/

http://www.google.nl/#hl=nl&source=hp&q ... 93&bih=908