post a form with ultimate short code “su_button” does not work

here is my php code :

<?php
echo “<form method=’post’ id=’majfiche’ action=’http://monsite’>&#8221;;
echo “<input type=text name=CHOIX_NOM value=’myname’>”;
echo “<input type=text name=CHOIX_ADRESSE value=’myadresse’>”;
echo “[su_button url=’http://monsite&#8217; onclick=’document.getElementById(majfiche).submit();’ icon=’icon: ban’ icon_color=’#f70009′]Enregistrer[/su_button]”;
echo “</form>”;

$postnonjson = array(
‘nom’ => $_POST[CHOIX_NOM],
‘adresse’ => $_POST[CHOIX_ADRESSE],
);
print_r($postnonjson);
?>

Here is the OUTPUT with the short code button:
Array
(
[nom] =>
[adresse] =>
)

no one variable $POST are send when i push on the ultimate short code button
but it’s work when i push on the simple html submit button

what is wrong in my code ? why can i do to submit a simple form with a ultimate short code button ?

I try to do this :
onclick='<script type=text/javascript>document.getElementById(majfiche).submit();</script>’
the result is the same. no variable are send