Ciao Las,
grazie al tuo consiglio ho risolto il problema.
Ora pero' ne ho di fronte un altro, nella pagina voucher.php ho aggiunto del codice html all'inizio e fin qui tutto bene ma quando aggiungo il pulsante di pagamento di paypal questo non viene visualizzato. In pratica si vede l'intestazione in html l'echo del form ma non il pulsante paypal. Potresti darmi un'ultimo aiutino per concludere il tutto?
Ti ringrazio

<html>
<head>
<meta charset="utf-8">
<title>gift voucher</title>
<link href="../css/index_mq.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="topbar" class="blacker">gift voucher</div>

<div id="v3message">Mio testo


Please verify your data: </p></div>


<?php

// ------------- CONFIGURABLE SECTION ------------------------

$mailto = 'mioindirizzo@mail.com' ;


// $subject - set to the Subject line of the email, eg
//$subject = "Feedback Form" ;

$subject = "gift voucher" ;

//$formurl = "voucher.html" ;
//$errorurl = "vouchererror.html" ;
//$thankyouurl = "voucher3.php" ;

$yourname_is_required = 1;
$youremail_is_required = 0;
$yourmobile_is_required = 1;
$howlong_is_required = 1;
$howmuch_is_required = 0;
$whatkind_is_required = 1;
$recipient_is_required = 1;
$donor_is_required = 1;
$send_is_required = 1;
$details_is_required = 0;
$uself = 0;
$use_envsender = 0;
$use_sendmailfrom = 0;
$use_webmaster_email_for_from = 0;
$use_utf8 = 1;
$my_recaptcha_private_key = '' ;

// -------------------- END OF CONFIGURABLE SECTION ---------------

$headersep = (!isset( $uself ) || ($uself == 0)) ? "\r\n" : "\n" ;
$content_type = (!isset( $use_utf8 ) || ($use_utf8 == 0)) ? 'Content-Type: text/plain; charset="iso-8859-1"' : 'Content-Type: text/plain; charset="utf-8"' ;
if (!isset( $use_envsender )) { $use_envsender = 0 ; }
if (isset( $use_sendmailfrom ) && $use_sendmailfrom) {
ini_set( 'sendmail_from', $mailto );
}
$envsender = "-f$mailto" ;
$yourname = (isset($_POST['yourname']))? $_POST['yourname'] : $_POST['yourname'] ;
$youremail = $_POST['youremail'] ;
$yourmobile = $_POST['yourmobile'] ;
$howlong = $_POST['howlong'] ;
$howmuch = $_POST['howmuch'] ;
$whatkind = $_POST['whatkind'] ;
$recipient = $_POST['recipient'] ;
$donor = $_POST['donor'] ;
$send = $_POST['send'] ;
$details = $_POST['details'] ;
$http_referrer = getenv( "HTTP_REFERER" );


//if (!isset($_POST['youremail'])) {
// header( "Location: $formurl" );
// exit ;
//}

if (($youremail_is_required && (empty($youremail) || !preg_match('/@/', $youremail))) || ($yourname_is_required && empty($yourname)) || ($yourmobile_is_required && empty($yourmobile)) || ($howlong_is_required && empty($howlong)) || ($howmuch_is_required && empty($howmuch)) || ($whatkind_is_required && empty($whatkind)) || ($recipient_is_required && empty($recipient)) || ($donor_is_required && empty($donor)) || ($send_is_required && empty($send)) || ($details_is_required && empty($details)) || ($howmuch_is_required && empty($howmuch))) {
header( "Location: $errorurl" );
exit ;
}
if ( preg_match( "/[\r\n]/", $yourname ) || preg_match( "/[\r\n]/", $youremail ) ) // {
//header( "Location: $errorurl" );
//exit ;
//}
//if ( preg_match( "/[\r\n]/", $yourname ) || preg_match( "/[\r\n]/", $youremail ) ) {
// header( "Location: $errorurl" );
// exit ;
//}
//if (strlen( $my_recaptcha_private_key )) {
// require_once( '../../testing/edge/recaptchalib.php' );
// $resp = recaptcha_check_answer ( $my_recaptcha_private_key, $_SERVER['REMOTE_ADDR'], $_POST['recaptcha_challenge_field'], $_POST['recaptcha_response_field'] );
// if (!$resp->is_valid) {
// header( "Location: $errorurl" );
// exit ;
// }
//}
if (empty($youremail)) {
$youremail = $mailto ;
}
$fromemail = (!isset( $use_webmaster_email_for_from ) || ($use_webmaster_email_for_from == 0)) ? $email : $mailto ;

if (function_exists( 'get_magic_quotes_gpc' ) && get_magic_quotes_gpc()) {
$details = stripslashes( $details );
}

//$messageproper =
// "This message was sent from:\n" .
// "$http_referrer\n" .

$messageproper = "This message was sent from miosito\n\n" .



"-------------------THE SENDER-----------------------\n\n" .

"name of sender: $yourname\n" .
"email of sender: $youremail\n" .
"mobile of sender: $yourmobile\n\n" .

"-----------------WHAT, WHO, HOW--------------------\n\n" .

"how long the massage: $howlong\n" .
"how much the GV: $howmuch\n" .
"what kind of massage: $whatkind\n" .
"who gets the GV: $recipient\n" .
"who gives the GV: $donor\n" .
"how do we send the GV: $send\n\n" .

"------------------ DETAILS ------------------\n\n" .
$details .

"\n\n----------------------------------------------\n" ;

//$headers =
// "From: \"$yourname\" <$youremail>" . $headersep . "Reply-To: \"$yourname\" //<$youremail>" . $headersep . "X-Mailer: chfeedback.php 2.15.0" .
// $headersep . 'MIME-Version: 1.0' . $headersep . $content_type ;

if ($use_envsender) {
mail($mailto, $subject, $messageproper, $headers, $envsender );
}
else {
mail($mailto, $subject, $messageproper, $headers );
}
//header( "Location: $thankyouurl" );
exit ;

?>

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="">
<table>
<tr><td><input type="hidden" name="on0" value="Select payment:">Select payment:</td></tr><tr><td><select name="os0">
<option value="standard 30' treatment.....$50.00 AUD">standard 30' treatment.....$50.00 AUD</option>
<option value="premium 30' treatment.....$55.00 AUD">premium 30' treatment.....$55.00 AUD</option>
<option value="standard 45' treatment.....$70.00 AUD">standard 45' treatment.....$70.00 AUD</option>
<option value="premium 45' treatment....$75.00 AUD">premium 45' treatment....$75.00 AUD</option>
<option value="standard 60' treatment.....$85.00 AUD">standard 60' treatment.....$85.00 AUD</option>
<option value="premium 60' treatment....$90.00 AUD">premium 60' treatment....$90.00 AUD</option>
<option value="standard 75' treatment...$100.00 AUD">standard 75' treatment...$100.00 AUD</option>
<option value="premium 75' treatment...$105.00 AUD">premium 75' treatment...$105.00 AUD</option>
<option value="standard 90' treatment...$120.00 AUD">standard 90' treatment...$120.00 AUD</option>
<option value="premium 90' treatment...$125.00 AUD">premium 90' treatment...$125.00 AUD</option>
</select> </td></tr>
<tr><td><input type="hidden" name="on1" value="Your comments or instructions">Your comments or instructions</td></tr><tr><td><input type="text" name="os1" maxlength="200"></td></tr>
</table>
<input type="hidden" name="currency_code" value="AUD">
<input type="image" src="http://miosito.com/images/paypal.gif" border="0" name="submit" alt="PayPal — The safer, easier way to pay online.">

</form>
</body>
</html>