Making DIV's look 3D using light with CSS
Can someone point me to a tutorial that shows how you can use css borders, shadows, or whatever to make div's look 3D, or sunken in or something. Basically I want this div to look like a button, but only when the mouse is over it, and when it's depressed I want it to look like its sunken in. I know how to do all of this except the lighting and stuff, it looks kinda funny. So is there a tutorial that shows you the best way to make stuff look 3D? Thanks
...And the Lord did grin. First, shalt thou take out thy holy pin, then, shalt thou count to three. No more, no less.