Have you ever been looking at the formatting of a web page, and wondered… how’d they do that? You could start digging through the source code, find the style sheet, and sift through it for the CSS you are interested in. Or, you could use Xyle scope…
“Using Xylescope is like surfing with an x-ray vision. You will immediately see beneath the surface of the web pages you are visiting. Experiment by changing CSS values in author style sheets – no matter if they are on the internet or on your own computer. Export interesting source code with ease and apply new and consistent formatting to your own CSS files.”
Xyle scope is shareware. A single license is $19.95, but it will run in demo mode (for 10 days I think) so you can take it for a test drive.