la funcion javascript
Código PHP:
   <script language="JavaScript" type="text/javascript">
 
function enviar(que)
{
document.argumento.accion.value = que ;
document.argumento.submit() ;
}
 
</script> 
   Código PHP:
   <?php 
                        include_once('funciones.php');
                        $db = conectar();
                        $consulta = "SELECT * FROM peliculas,directores,actores WHERE peliculas.actor=actores.id AND peliculas.director=directores.id";
                        $result =mysql_query($consulta,$db) or die ("<p> Error en la consulta.</p>\n");
                        print "<p>Listado completo de registros:</p>\n
                        <form name=argumento method=post action=\"argumento.php\"><table border=\"1\">
                        <tr class=\"neg\">
                          <th>
                            Titulo
                        </th>
                         <th>
                            Actor
                        </th>      
                          <th>
                            Genero
                        </th>
                          <th>
                            Precio
                        </th>
                         <th>
                            Director
                        </th>
                         <th>
                            Productora
                        </th>
                         <th>
                            Argumento
                        </th>
                        </tr>\n";
            while ($reg=mysql_fetch_array($result,$db))
            {
            print "<td>$reg[titulo]</td>
                  <td>$reg[nombre]</td>
                  <td>$reg[genero]</td>
                  <td>$reg[precio]</td>
                  <td>$reg[director]</td>
                  <td>$reg[productora]</td>
                  <td><a href=\"#\" onclick=\"javascript:enviar(\"$reg[argumento]\");\">+ info</a></tr>";
        }
        print " </table></form>\n";
 
mysql_close($db);
?>    Código PHP:
   <?php
                            include_once('funciones.php');
                            $db=conectar();
                            $consulta="SELECT argumento FROM peliculas WHERE argumento=$_REQUEST[accion];"
                            $query=mysql_query($consulta,$db);
                            $row=mysql_query_fetch_row($query);
                            print $row;
                        ?>    
 
