[thelist] a:hover subelement?

[Kevin]

Hi all,

COuld someone take a quick look at this.
I'm trying to create a little re-usable effect with CSS.
I'm not  sure if it's posible to have change a subelement of a link like this.
Thouhgts?

HTML CODE:
<div id="nav"><a href="#"><em> -- </em>moo</a>

CSS CODE:
#nav a {
	color: black;
}

#nav a em {
	color: white;
}

ALl the above works, except for the hover.

#nav a:hover em {
	color: blue;
}