web-development/zoesch.de/js/formControl.js

$('#kontakt-form').submit(function() {
    var formControl = true;

    var frmGrpName = $('#frmGrpName');
    var frmGrpEmail = $('#frmGrpEmail');
    var frmGrpTelefon = $('#frmGrpTelefon');
    var frmGrpMessage = $('#frmGrpMessage');

    var respMessage = $('#response');

    frmGrpName.removeClass('has-error');
    frmGrpEmail.removeClass('has-error');
    frmGrpMessage.removeClass('has-error');
    respMessage.removeClass('alert');
    respMessage.removeClass('alert-danger');
    respMessage.removeClass('alert-success');

    var name = $('#name').val();
    var email = $('#email').val();
    var telefon = $('#telefon').val();
    var message = $('#message').val();
    var isHuman = grecaptcha.getResponse();

    if(name == '') {
      formControl = false;
      frmGrpName.addClass('has-error');
    }

    if(email == '') {
      formControl = false;
      frmGrpEmail.addClass('has-error');
    }

    if(message == '') {
      formControl = false;
      frmGrpMessage.addClass('has-error');
    }

    if(isHuman.length == 0) {
      formControl = false;
    }

    if(formControl) {
      $.ajax({
        type: 'POST',
        url: 'send.php',
        data: {
          name:name,
          email:email,
          telefon:telefon,
          message:message,
          isHuman:isHuman
        }
      }).done(function(response){
        respMessage.html(response);
        respMessage.addClass('alert');
        respMessage.addClass('alert-success');
      });
    } else {
      respMessage.html("Bitte alle gekennzeichneten Felder ausfüllen und bestätigen, dass Sie kein Roboter sind!");
      respMessage.addClass('alert');
      respMessage.addClass('alert-danger');
    }
    return false;
});