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Test Info:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"
<HEAD>
</HEAD>
<BODY>
<table bgcolor=orange border>
<tr>
<td>c11</td><td>c12</td><td>c13</td><td>c14</td>
</tr>
<tr>
<td id="c21">c21</td>
</tr>
</table>
<script>
document.body.offsetWidth;
c21 = document.getElementById("c21");
td = document.createElement("td");
td.setAttribute("colspan", "0");
td.appendChild(document.createTextNode("X1"));
c21.parentNode.insertBefore(td, c21.nextSibling);
</script>
</BODY></HTML>