<form id="contact">
    <p class="message dn"></p>
    <div class="row">
        <div class="col-sm-6">
            <input class="form-control" type="text" name="prename" placeholder="Ihr Vorname*">
        </div>
        <div class="col-sm-6">
            <input class="form-control" type="text" name="surname" placeholder="Ihr Nachname*">
        </div>
    </div>
    <div class="row">
        <div class="col-sm-6">
            <input class="form-control" type="text" name="email" placeholder="Ihre E-Mail Adresse*">
        </div>
        <div class="col-sm-6">
            <input class="form-control" type="text" name="phone" placeholder="Ihre Telefonnummer">
        </div>
    </div>
    <textarea class="form-control" name="message" placeholder="Ihre Nachricht"></textarea>
</form>
<p class="text-center"><button class="btn btn-primary submit" data-formid="contact" data-formtarget="contactform.json">Absenden</button></p>