Issue with onmouseover when attempting to change bgcolor

I am setting up a skeleton jsp page to be used by my team which will consist of a header, left nav, and a footer.
The issue I am having is that on the left nav I want the menu items to change color based on an onmouseover or onmouseout event. I know the following will work:
<td height="20" bgcolor="#f2f2f2" onMouseOver='bgColor="#80d8d8"' onMouseOut='bgColor="#f2f2f2"'>
Credit Referrals
</td>
However, what I would like to do is not have to hardcode the bgcolor= parameter on each of my <td> statements. Instead, is there a way to use a style sheet so that I can simply refer the onmouseover/out events to the bgcolor in the style sheet?
Thanks...

try this out.
========================
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<style type="text/css">
.navmenu {cursor: hand;
background-color: #e2e2e2;}
.navsub {cursor: hand;
background-color: #f2f2f2;}
.navdv {background-color: #808874;}
</style>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
</HEAD>
Here is my code using the class .navmenu :
<div class="navmenu" id="mydiv" onmouseover="changecolor('mydiv','navsub')" onmouseout="changecolor('mydiv','navdv')">
<tr >
<td height="20">
<b>Queues</b>
</td>
</tr>
</div>
<BODY>
</BODY>
</HTML>

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