alternar color de fondo de una tabla

[urjose]

Yo use esto:

Código PHP:

  <?
        $counter=0;                    while($row = $rs->obtenerArray())
                            { 
                                  if($counter%2==0)
                                  {
                                        $color="#FFFFFF";
                                  }
                                  else
                                  {
                                        $color="#F0F0F0";
                                  }
?>
// muestro los td o tr con bgcolor="<?echo $color;?>"
              <?
              $counter+=1;
            } 
                            ?>   

Saludos