Forum - RE: Eigenes Kontaktformular für Gäste - HTML - 2

 <!-- Selectbox - Auswahl Kategorie --> 
<div class="requiredCheck">
  <label class="kontakt_label" for="Bitte angeben" style="width: auto"><strong><span style="color: red; ">*</span> Bitte angeben:</strong></label><br>
  <input type="checkbox" name="Base" value="Base" required="required">
  <label for="Base">Base</label>
  <input type="checkbox" name="Mobil" value="Mobil" required="required">
  <label for="Mobil">Mobil</label>
  <input type="checkbox" name="Portable" value="Portable" required="required">
  <label for="Portable">Portable</label>
</div> 
 
<!-- Notwendig, wenn kein jQuery vorhanden ist! -->
<script type="text/javascript" src="https://img.homepagemodules.de/ds/static/jquery/min/jquery-1.7.1.min.js"></script> 
<script>
// Checkboxen: Mindestens eine Box anklicken!
document.addEventListener('DOMContentLoaded', function() {
    var requiredCheckboxes = $('.requiredCheck :checkbox[required]');
    requiredCheckboxes.change(function(){
        if(requiredCheckboxes.is(':checked')) {
            requiredCheckboxes.removeAttr('required');
        } else {
            requiredCheckboxes.attr('required', 'required');
        }
    });
});
</script>