Ho usato (anche se me lho sconsigliato) la position:fixed.
ecco il codice:
codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Untitled</title>
<meta content="Evrsoft First Page" name="GENERATOR">
<style type="text/css">
table td:first-child {position:fixed;}
</style>
</head>
<body>
<table width="2000px" border="1">
<caption><div align="center">Fatturato dell'azienda XYZ</div></caption>
<colgroup span="1" bgcolor="red" style="position:fixed;">
<thead>
<tr>
<th width="20%">Mesi di attività</th>
<th width="40%">Fatturato da attività 1 (in euro)</th>
<th width="40%">Fatturato da attività 2 (in euro)</th>
</tr>
</thead>
<tfoot>
<tr>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td >Totale</td>
<td >450.000</td>
<td >45.000</td>
</tr>
</tfoot>
<tbody>
<tr>
<td >gen</td>
<td >10.000</td>
<td >1.000</td>
</tr>
<tr>
<td >feb</td>
<td >20.000</td>
<td >2.000</td>
</tr>
<tr>
<td >mar</td>
<td >30.000</td>
<td >3.000</td>
</tr>
<tr>
<td >apr</td>
<td >40.000</td>
<td >4.000</td>
</tr>
<tr>
<td >ago</td>
<td >50.000</td>
<td >5.000</td>
</tr>
<tr>
<td >sett</td>
<td >60.000</td>
<td >6.000</td>
</tr>
<tr>
<td height="24">ott</td>
<td >70.000</td>
<td >7.000</td>
</tr>
<tr>
<td >nov</td>
<td >80.000</td>
<td >8.000</td>
</tr>
<tr>
<td height="24" >dic</td>
<td >90.000</td>
<td >9.000</td>
</tr>
</tbody>
</table>
</body>
</html>
ovviamente funziona solo su ff