Formulaire multi destinataire

Bonjour,
Je cherche a faire un formulaire de contact pour mon site. Il fonctionne maintenant bien, j'aimerai lui ajouter la possibilité de choisir à quelle adresse envoyé le formulaire.
Voici mon code, si quelqu'un pouvais m'aider a trouver comment faire ça serai super

merci d'avance

<?
/* PARAMETRAGE DU SCRIPT */
/* ENTREZ VOTRE ADRESSE EMAIL ENTRE LES GUILLEMETS*/

$dest=$for;
$reponse=StripSlashes("Thank you for contacting Us, Your e-mail has been recieved and we will get back to you as soon as possible! Thank You, FS System Administration");

/* FIN DU PARAMETRAGE */


/*

Form Mail +
DESCRIPTION

        this class encapsulates the PHP mail() function.
        implements CC, Bcc, Priority headers
*/



class Mail
{

        var $sendto= array();
        var $from, $msubject;
        var $acc= array();
        var $abcc= array();
        var $aattach= array();
        var $priorities= array( '1 (Highest)', '2 (High)', '3 (Normal)', '4 (Low)', '5 (Lowest)' );
	var $for= array( '1 (mail1@xx.com)', '2 (mail2@xx.com)', '3 (mail3@xx.com)', '4 (mail4@xx.com)', '5 (mail5@xx.com)', '6 (mail6@xxl.com)' );


// Mail contructor

function Mail()
{
        $this->autoCheck( true );
}


/*                autoCheck( $boolean )
 *                activate or desactivate the email addresses validator
 *                ex: autoCheck( true ) turn the validator on
 *                by default autoCheck feature is on
 */

function autoCheck( $bool )
{
        if( $bool )
                $this->checkAddress = true;
        else
                $this->checkAddress = false;
}


/*                Subject( $subject )
 *                define the subject line of the email
 *                $subject: any valid mono-line string
 */

function Subject( $subject )
{
        $this->msubject = strtr( $subject, "\r\n" , "  " );
}


/*                From( $from )
 *                set the sender of the mail
 *                $from should be an email address
 */

function From( $from )
{

        if( ! is_string($from) ) {
                echo "Class Mail: error, From is not a string";
                exit;
        }
        $this->from= $from;
}


/*                To( $to )
 *         set the To ( recipient )
 *                $to : email address, accept both a single address or an array of addresses
 */

function To( $to )
{

        // TODO : test validité sur to
        if( is_array( $to ) )
                $this->sendto= $to;
        else
                $this->sendto[] = $to;

        if( $this->checkAddress == true )
                $this->CheckAdresses( $this->sendto );

}


/*                Cc()
 *                set the CC headers ( carbon copy )
 *                $cc : email address(es), accept both array and string
 */

function Cc( $cc )
{
        if( is_array($cc) )
                $this->acc= $cc;
        else
                $this->acc[]= $cc;

        if( $this->checkAddress == true )
                $this->CheckAdresses( $this->acc );

}



/*                Bcc()
 *                set the Bcc headers ( blank carbon copy ).
 *                $bcc : email address(es), accept both array and string
 */

function Bcc( $bcc )
{
        if( is_array($bcc) ) {
                $this->abcc = $bcc;
        } else {
                $this->abcc[]= $bcc;
        }

        if( $this->checkAddress == true )
                $this->CheckAdresses( $this->abcc );
}


/*                Body()
 *                set the body of the mail ( message )
 */

function Body( $body )
{
        $this->body= $body;
}


/*                Send()
 *                fornat and send the mail
 */

function Send()
{
        // build the headers
        $this->_build_headers();

        // include attached files
        if( sizeof( $this->aattach > 0 ) ) {
                $this->_build_attachement();
                $body = $this->fullBody . $this->attachment;
        }

        // envoie du mail aux destinataires principal
        for( $i=0; $i< sizeof($this->sendto); $i++ ) {
                $res = mail($this->sendto[$i], $this->msubject,$body, $this->headers);
                // TODO : trmt res
        }

}


/*                Organization( $org )
 *                set the Organisation header
 */

function Organization( $org )
{
        if( trim( $org != "" )  )
                $this->organization= $org;
}


/*                Priority( $priority )
 *                set the mail priority
 *                $priority : integer taken between 1 (highest) and 5 ( lowest )
 *                ex: $m->Priority(1) ; => Highest
 */

function Priority( $priority )
{

        if( ! intval( $priority ) )
                return false;

        if( ! isset( $this->priorities[$priority-1]) )
                return false;

        $this->priority= $this->priorities[$priority-1];

        return true;

}


/*                Attach( $filename, $filetype )
 *                attach a file to the mail
 *                $filename : path of the file to attach
 *                $filetype : MIME-type of the file. default to 'application/x-unknown-content-type'
 *                $disposition : instruct the Mailclient to display the file if possible ("inline") or always as a link ("attachment")
 *                        possible values are "inline", "attachment"
 */

function Attach( $filename, $filetype='application/x-unknown-content-type', $disposition = "inline" )
{
        // TODO : si filetype="", alors chercher dans un tablo de MT connus / extension du fichier
        $this->aattach[] = $filename;
        $this->actype[] = $filetype;
        $this->adispo[] = $disposition;
}


/*                Get()
 *                return the whole e-mail , headers + message
 *                can be used for displaying the message in plain text or logging it
 */

function Get()
{
        $this->_build_headers();
        if( sizeof( $this->aattach > 0 ) ) {
                $this->_build_attachement();
                $this->body= $this->body . $this->attachment;
        }
        $mail = $this->headers;
        $mail .= "\n$this->body";
        return $mail;
}


/*         ValidEmail( $email )
 *         return true if email adress is ok - regex from Manuel Lemos (mlemos@acm.org)
 *                $address : email address to check
 */

function ValidEmail($address)
{
        if( ereg( ".*<(.+)>", $address, $regs ) ) {
                $address = $regs[1];
        }
         if(ereg( "^[^@  ]+@([a-zA-Z0-9\-]+\.)+([a-zA-Z0-9\-]{2}|net|com|gov|mil|org|edu|int)\$",$address) )
                 return true;
         else
                 return false;
}


/*                CheckAdresses()
 *         check validity of email addresses
 *         if unvalid, output an error message and exit, this may be customized
 *                $aad : array of emails addresses
 */

function CheckAdresses( $aad )
{
        for($i=0;$i< sizeof( $aad); $i++ ) {
                if( ! $this->ValidEmail( $aad[$i]) ) {
                        echo "Class Mail, method Mail : invalid address $aad[$i]";
                        exit;
                }
        }
}


/********************** PRIVATE METHODS BELOW **********************************/



/*                _build_headers()
 *                 [INTERNAL] build the mail headers
 */

function _build_headers()
{

        // creation du header mail

        $this->headers= "From: $this->from\n";

        $this->to= implode( ", ", $this->sendto );

        if( count($this->acc) > 0 ) {
                $this->cc= implode( ", ", $this->acc );
                $this->headers .= "CC: $this->cc\n";
        }

        if( count($this->abcc) > 0 ) {
                $this->bcc= implode( ", ", $this->abcc );
                $this->headers .= "BCC: $this->bcc\n";
        }

        if( $this->organization != ""  )
                $this->headers .= "Organization: $this->organization\n";

        if( $this->priority != "" )
                $this->headers .= "X-Priority: $this->priority\n";

}



/*
 *                _build_attachement()
 *                internal use only - check and encode attach file(s)
*/
function _build_attachement()
{
        $this->boundary= "------------" . md5( uniqid("myboundary") ); // TODO : variable bound

        $this->headers .= "MIME-Version: 1.0\nContent-Type: multipart/mixed;\n boundary=\"$this->boundary\"\n\n";
        $this->fullBody = "This is a multi-part message in MIME format.\n--$this->boundary\nContent-Type: text/plain; charset=us-ascii\nContent-Transfer-Encoding: 7bit\n\n" . $this->body ."\n";
        $sep= chr(13) . chr(10);

        $ata= array();
        $k=0;

        // for each attached file, do...
        for( $i=0; $i < sizeof( $this->aattach); $i++ ) {

                $filename = $this->aattach[$i];
                $basename = basename($filename);
                $ctype = $this->actype[$i];        // content-type
                $disposition = $this->adispo[$i];

                if( ! file_exists( $filename) ) {
                        echo "Class Mail, method attach : file $filename can't be found"; exit;
                }
                $subhdr= "--$this->boundary\nContent-type: $ctype;\n name=\"$basename\"\nContent-Transfer-Encoding: base64\nContent-Disposition: $disposition;\n  filename=\"$basename\"\n";
                $ata[$k++] = $subhdr;
                // non encoded line length
                $linesz= filesize( $filename)+1;
                $fp= fopen( $filename, 'r' );
                $data= base64_encode(fread( $fp, $linesz));
                fclose($fp);
                $ata[$k++] = chunk_split( $data );

/*
                // OLD version - used in php < 3.0.6 - replaced by chunk_split()
                $deb=0; $len=76; $data_len= strlen($data);
                do {
                        $ata[$k++]= substr($data,$deb,$len);
                        $deb += $len;
                } while($deb < $data_len );

*/
        }
        $this->attachment= implode($sep, $ata);
}


} // class Mail

$subject=StripSlashes($subject);
$msg=StripSlashes($msg);
$msg="Message depuis votre site web:
$msg";
$m= new Mail; // create the mail
        $m->From( "$email" );
        $m->To( "$dest");     
        $m->Subject( "$subject" );
        $m->Body( $msg);        // set the body
if ($email1!="") {
        $m->Cc( "$email1");
	}
        $m->Priority($priority) ;   
if ("$NomFichier_name"!="") {
	copy("$NomFichier","../upload/$NomFichier_name");
	$m->Attach( "../upload/$NomFichier_name", "application/octet-stream" );
	}
        $m->Send(); 
if ("$NomFichier_name"!="") {
Unlink("../upload/$NomFichier_name");   }     
echo "$reponse";

?>