underscores in css

[boojum]

Whenever i validate a css file at the w3c, i get an error for each class/id that has an underscore in it. As far as i can tell, http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier says underscores are legal. are they?

[Jonathan]

Just don't use the underscores, just join the words... for example...

your_word = YourWord

you can understand it, that is all that counts, just remember that css is case-sensitive...

[Robert Wellock]

The vaildator does have a few errors but the following would be correct: .web-master{ background-color: red; }