Letter/Link spacing

[yippi_yi_yo]

Apparently it's a CSS code, but I can't find it, so does anyone know it?
My links appear as normal but when the mouse is over them, how can you make them appear spaced out?

EG/
normal --> link
mouseOver--> l i n k

Anyone know?

[Twey]

letter-spacing:
I wouldn't advise this, though, because it will make all the rest of your text move.

[yippi_yi_yo]

Yeah I know. But I'm using letter spacing as only a navigational thing so it wont affect the text.
Thanks. :D