Form submit not posting Safari - php

Question

I've got a registration form setup which works fine on all browsers...except Safari.
I thought it should be a problem that deals with Javascript, as it mostly is. But after I turned Javascript off in Safari, there's still no data being posted.
The form is live on:
http://tpgrf.nl/testserver/alpha/account/registreer/
I've added this text on top of the page, for testing, to make sure if data has been posted or not.
if($_SERVER['REQUEST_METHOD'] == 'POST'){
echo 'post';
}else{
echo 'niets gepost';
}
Any thoughts where to look for the answer?
EDIT: Here's the form (output HTML)
<form name="registerform" id="registerform" action="http://tpgrf.nl/testserver/alpha/account/registreer/" method="post">
<script type="text/javascript">
jQuery(document).ready(function($) {
//Since we want users to login with there email; there's no need to also register a username. Therefore the username field = email field
$("#user_login").live('change', function(){
$('#user_email').val($("#user_login").val());
});
//Display fields, depending on the selected role
$('#role').live('change', function(){
if($('#role').val() === 'docent'){
$('#messageRegisterDocent').show();
$('#pKlas').hide();
}else{
$('#messageRegisterDocent').hide();
$('#pKlas').show();
}
});
//The json call to automcplete School
var ajaxurl = 'http://tpgrf.nl/testserver/alpha/wp-admin/admin-ajax.php';
$("#school").autocomplete({
delay: 0,
minLength: 1,
source: function(req, response){
$.getJSON('http://tpgrf.nl/testserver/alpha/wp-admin/admin-ajax.php?callback=?&action=school_autocomplete', req, response);
},
select: function(event, ui){
$('#school').val(ui.item.label);
$('#school_id').val(ui.item.school_id);
}
});
});
</script>
<p>
<input type="hidden" name="user_email" id="user_email" class="input" value="" size="20" />
<p>
<label for="user_login">E-mail</label>
<input type="email" name="user_login" id="user_login" class="input" value="" size="20" />
</p>
<p>
<label>Voornaam</label>
<input id="first_name" type="text" size="25" value="" name="first_name" />
</p>
<p>
<label>Achternaam</label>
<input id="last_name" type="text" size="25" value="" name="last_name" />
</p>
<p>
<label>Ik ben...</label>
<select name="role" id="role">
<option value="">...selecteer</option>
<option value="leerling" >Leerling</option>
<option value="docent" >Docent</option>
</select>
<p class="message" id="messageRegisterDocent" style="display:none;"><strong>Let op:</strong> registreer met uw e-mailadres van de school waar u werkzaam bent. <br />Voor een aantal functies vindt namelijk handmatige autorisatie plaats; dit is niet mogelijk met een privé e-mailadres.</p>
</p>
<p>
<label>Mijn school</label>
<input type="text" id="school" class="autoComplete" size="25" value="" name="school" />
<input type="hidden" id="school_id" name="school_id" value="">
</p>
<p id="pKlas"style="display:none;">
<label>Mijn klas</label>
<input type="text" id="klas" size="25" value="" name="klas" />
</p>
<p id="reg_passmail">U zult een wachtwoord per e-mail ontvangen.</p>
<p class="submit">
<input type="submit" name="wp-submit" id="wp-submit" value="Registratie" />
of Ik heb al een account...
<input type="hidden" name="redirect_to" value="/testserver/alpha/account/login/?checkemail=registered" />
<input type="hidden" name="instance" value="" />
</p>
</form>

Answer 1

Your problem might be caused by the following line of code:
<input type="submit" name="wp-submit" id="wp-submit" value="Registratie" />
You wrap the submit button tag inside an 'a' tag which is pointing to an empty URL and causes a link to the current page only. It might be that Safari does not parse this wrapped button well, and instead prefers the A link over the submit button.
Unwrapping the 'input' tag and changing the code to:
<input type="submit" name="wp-submit" id="wp-submit" value="Registratie" />
might work.