AUUCCHHHH..!!!!
solucionado pero gracias!!!!
la cosa quedo asi....
Código PHP:
Ver original<form action="<?php echo $editFormAction; ?>" id="form1" name="form1" method="POST">
<?php do { ?>
<table width="899" border="0" align="center">
<tr bgcolor="#E6F0FF" class="azul_claro3">
<td width="60" align="center" valign="middle" class="Estilo2"><?php echo $row_clientes['id']; ?></td>
<td width="150" align="center" valign="middle" class="Estilo2"><?php echo $row_clientes['codclient']; ?></td>
<td width="250" align="center" valign="middle" class="Estilo2"><?php echo $row_clientes['empresa']; ?></td>
<td width="150" align="center" valign="middle" class="Estilo2"><?php echo $row_clientes['fecha']; ?></td>
<td align="center" valign="middle" class="Estilo2"><p>
<input name="id[]" type="text" id="id" value="<?php echo $row_clientes['id']; ?>" size="3" class="Estilo2"/>
<select name="nivel[]" id="nivel" class="Estilo2">
<option value="0"
<?php if (!(strcmp(0, $row_clientes['nivel']))) {echo "selected=\"selected\"";} ?>>Desactivada</option>
<option value="3"
<?php if (!(strcmp(3, $row_clientes['nivel']))) {echo "selected=\"selected\"";} ?>>Usuario</option>
</select>
<input name="guardar" type="submit" class="Estilo2" id="guardar" value="Guardar"/>
<?php //echo $updateSQL;?></td>
</tr>
</table>
<?php
if ((isset($_POST["MM_update"])) && ($_POST["MM_update"] == "form1")) { foreach ($_POST['id'] as $key => $value){
$updateSQL = sprintf("UPDATE clientes SET nivel=%s WHERE id=%s", GetSQLValueString($_POST['nivel'][$key], "text"),
GetSQLValueString($_POST['id'][$key], "int"));
}}
?>
<input type="hidden" name="MM_update" value="form1" />
</form>