Semi-transparent table background?

[Captain X]

Is there an html or CSS coding I can use to make the solid background color of a table appear semi-transparent, so the website background picture would actually be somewhat visable through it?

 

[Mr. B]

http://www.google.com/search?q=translucent+css

 

[Captain X]

Okay, stupid question...

 

[Captain X]

^Of course it still doesn't work.