CSS Alignment Question

All,
Our shopping cart app (.asp) has some css code that shows the categories on the left side of the screen.

On the same line (but on the right), we would like to add a log out text link. I'm NO expert in CSS but can usually figure this stuff out but I'm stuck.

This code is used for other things so I'd like to be able to add an element (not sure the right lingo) to it so it doesn't affect the current css.

CSS CODE:
.pcPageNav {
		text-align: left;
		width: 100%;
		border: 0;
		border-collapse: collapse;
		margin: 10px 0 10px 5px;
	}


CODE ON PAGE (I removed the unimportant asp code):

<div class="pcPageNav">
navigation goes here
</div>

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