HTML Formular Markup
<form class="t3wrapper_{wrapper.uid}" action="#subscribe" method="post" accept-charset="utf-8">
<div class="alert" style="display:none;"></div>
<div class="form-group">
<input class="form-control input-lg" type="text" name="em" value="" placeholder="z.B.: max.mustermann@gmail.de">
</div>
<div class="form-group">
<input class="btn btn-lg btn-primary" type="submit" name="submit" value="Sign up / Update Abonnement">
</div>
</form>