<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <head><title>CSS 2.1 Test Suite: border collapse dynamic change to row border width</title> <link rel="author" title="Bernd Mielke" href="mailto:bmlk@gmx.de" /> <link rel="help" href="http://www.w3.org/TR/CSS21/tables.html#collapsing-borders" /> <meta name="flags" content="dom" /> <script> function doTest(){ var t1 =document.getElementById('target'); t1.style.borderWidth="20px"; } </script> <style> td { border: 10px green solid;} table {margin: 30px} </style> </head> <body onload="doTest()";> <table style="border-collapse:collapse"> <tr><td>c11</td><td>c12</td><td>c13</td></tr> <tr id="target" style="border:solid green 2px"><td>c21</td><td>c22</td><td>c23</td></tr> <tr><td>c31</td><td>c32</td><td>c33</td></tr> </table>