How do I create roll over tab menu bar in CSS? I keep looking up ways to do this, but I find only ways to download it from a website (which I fear may have a virus) or in dreamweaver (which I don't have). Also if it's not too much to ask please connect the tabs as well. I have spent 2 full days trying to figure this out. The last thing is I would like to have it centered.

If anyone can show me how it is done I would be very thankful.