El codigo que me lista los registros:
while($row2=mysql_fetch_array($registros))
{
$arregcedula[$c-1]=$row2["cedula"];
$nom="chk".$c;
echo "<tr><td><input type='checkbox' name='$nom' value=1></td>";
echo "<td>"; echo $row2["cedula"];
echo "</td>";
echo "<td>"; echo $row2["nombre"];
echo "</td>";
echo "<td>"; echo $row2["cargo"];
echo "</td>";
echo "<td>"; echo $row2["contrato"];
echo "</td>";
echo "<td>"; echo $row2["email"];
echo "</td>";
echo "<td>"; if ($row2['visible']=='1') echo"<img src='check.png' width='25' height='20'/>";
elseif ($row2['visible']=='0'){echo"<img src='nocheck.png' width='25' height='20'/>";}//echo $row2["visible"];
echo "</td>";
echo "<td>"; if ($row2['activo']=='1') echo"<img src='check.png' width='25' height='20'/>";
elseif ($row2['activo']=='0'){echo"<img src='nocheck.png' width='25' height='20'/>";}//echo $row2["activo"];
echo"</td></tr>";
$c++;
}
echo "</table></center><br>
<center><input type=submit name=elim value=Eliminar></center>
</form>";
echo"<center><form name='form1' method='post' action='contratos.php'>";
echo"<input type='submit' name='Submit' value='<< Volver'>";
echo"</form></center>";
el archivo eliminar.php
require_once ("conexion.php");
$link=conectarse();
for($c=1;$c<=$cantreg;$c++)
{
$nom="chk".$c;
if($$nom==1)
{
$sql="delete from contratos where cedula='".$arregcedula[$c-1]."'";
mysql_query($sql,$link);
}
}