gracias
Código:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>Documento sin título</title> </head> <body> <form action="comparaciones.php" method="post" > <input name="mes" type="text" maxlength="10" /> <input name="enviar" type="submit" value="enviar" /> </form> </body> </html> <? echo $mes; ?>