Set the table cellspacing and cellpadding tozero.
Then insert a transparent .gif into each cell in the row, sized to the
height you need.
example
<tr>
<td><img src="images/tp.gif" width="10" height="2" alt=""></td>
Make sure that the <td> and </td> are on the same line of code, and do
not allow any other characters (spaces, letters, numbers, punctuation)
to creep in.