<html>
<head>
   <title>Column Groups</title>
</head>

<body>
<table border="2" width="100%">
   
   <caption>Column Grouping</caption>
   
   <colgroup bgcolor="green">
   <colgroup align="left" bgcolor="pink">
   <colgroup align="center" bgcolor="yellow">
   <colgroup valign="top" bgcolor="blue">
      
   <tr>
   <td>content</td>
   <td>content</td>
   <td>content</td>
   <td>content</td>
   
   </tr>
   
   <tr>
   <td>content</td>
   <td>content</td>
   <td>content</td>
   <td>content</td>
   
   </tr>
   
   <tr>
   <td>content</td>
   <td>content</td>
   <td>content</td>
   <td>content</td>
   
   </tr>
   
   </table>


</body>
</html>