Is there any way to have the background color change in a cell only when the mouse is over the link?

This is what I have so far:

<td class=topnav2 onClick="location.href='AboutAD/overview.htm'" onMouseOut="this.style.backgroundColor='#9966FF'"onMouseOver="this.style.backgroundColor='#660099'" bgcolor="#9966FF" width="107" height="45"valign="middle">
<a class="topnav2" href="AboutAD/overview.htm">About Alzheimer's</a>

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Currently you rollover the cell it changes color, I just want this effect when you roll over the text.

thanks in advance

xnihilo