Well, toto je daky quick hack co som dal dokopy z toho Tvojho kodu:
Kód:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>Test</title>

<style type="text/css">
<!--

table &#123;
   border&#58; 0px;   
   border-spacing&#58; 0px 0px;
   border-collapse&#58; collapse;
   margin&#58;0px auto;   
   text-align&#58;left;
&#125;

.downframe td &#123;
   border-bottom&#58; 1px solid #330066;
&#125;

-->
</style>
</head>

<body>

<h1>Kontakt</h1>

<div style="text-align&#58;center">

<table class="downframe">
<tr>
<td style="text-align&#58; right;font-weight&#58; bold;">prvni text</td>
<td colspan="2">druhej text</td>
</tr>

<tr>
<td style="text-align&#58; right;font-weight&#58; bold;">druhej</td>
<td>opet
<td>a zase</td>
</tr>
</table>

</div>

</body>
</html>
snad to robi to co chces...