|  | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>border collapse dynamic change to table border width</title> | 
|  | <link rel="author" title="Bernd Mielke" href="mailto:bmlk@gmx.de" /> | 
|  | <style type="text/css"><![CDATA[ | 
|  | td { border: 10px green solid;} | 
|  | table {margin: 30px; border-collapse:collapse; border:solid green 20px} | 
|  | ]]></style> | 
|  | </head> | 
|  | <body> | 
|  |  | 
|  | <p>There should be a continuous solid thick border around a grid of 3 rows and 3 columns. The borders inside the grid should be half the thickness of the outside border of the grid.</p> | 
|  |  | 
|  | <table> | 
|  | <colgroup><col /></colgroup> | 
|  | <colgroup><col /></colgroup> | 
|  | <colgroup><col /></colgroup> | 
|  | <tbody><tr><td>c11</td><td>c12</td><td>c13</td></tr></tbody> | 
|  | <tbody> | 
|  |  | 
|  | <tr><td>c21</td><td>c22</td><td>c23</td></tr> | 
|  | </tbody> | 
|  | <tbody> | 
|  | <tr><td>c31</td><td>c32</td><td>c33</td></tr> | 
|  | </tbody> | 
|  | </table> | 
|  |  | 
|  | </body></html> |