<STYLE TYPE="text/css">
<--
   TABLE {table-layout:fixed; width: 100%}
   #fixed COL {width: 50%}
-->
</STYLE>

<TABLE>
   <COL><COL>
   <TR><TD>Cell 1</TD><TD>Cell 2</TD></TR>
   <TR><TD>Cell 3</TD><TD>Cell 3</TD></TR>
</TABLE>