If your trying to define a class for a logo there are many options availabe. I would research CSS image variables to option the look and feel you want but you can start with this basic class and define from there.
.logo {
background: ;
color: ;
height: ;
width: ;
background-image: url (
http://www.yoursite.com/someimage.png);
They posted this above. so use this in your stylesheets and define all the variables here and the image path
your header would look something like this
<table class="tableborders">
<tr class="tdheaders">
<td class="logo">
Other header stuff here
</td>
</tr>
</table>
