<html>
<head>
<style>
table          { border-collapse: collapse;
                 border: 5px solid yellow; }
*#col1         { border: 3px solid black; }
td             { border: 1px solid red; padding: 1em; }
td.solid-blue  { border: 5px dashed blue; }
td.solid-green { border: 5px solid green; }
</style>
</head>
<body>
<P>
<TABLE>
<COL id="col1"><COL id="col2"><COL id="col3">
<TR id="row1">
    <TD> 1
    <TD> 2
    <TD> 3
</TR>
<TR id="row2">
    <TD> 4 
    <TD class="solid-blue"> 5
    <TD class="solid-green"> 6
</TR>
<TR id="row3">
    <TD> 7
    <TD> 8
    <TD> 9
</TR>
<TR id="row4">
    <TD> 10
    <TD> 11
    <TD> 12
</TR>
<TR id="row5">
    <TD> 13
    <TD> 14
    <TD> 15
</TR>
</table>
</p>
</body>
</html>