http://www.w3schools.com/ is a good place to start.
W3 Schools has got a few tutorials on them, and there are plenty more scattered around the web. I also think that if you're doing web design or programming, having a book on hand to look things up is still a good idea, even with the advent of search engines like Google. With standards changing so quickly, it might seem like a bit of a waste, but if you intend to do quite a lot of work with it, it's a good idea!