<html>
<body>
<table>
<tr>
<th id="th1">Row 1</th>
<td>Cell</td>
<td>Cell</td>
<td>Cell</td>
<td id="td1">Cell info 1</td>
<td>Cell</td>
</tr>
</table>
<script language="JavaScript">
document.all.th1.scope = "colgroup";
</script>
<button onclick="alert('This cell provides header information for its col.');">
Cell info 1
</button>
</body>
</html>
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