AJAX jQuery Validation

// newad.html
$(document).ready(function() {
  $('#submitButton').on('click', function() {
    var data = {};
    data.formPhone = $('#formPhone').val();

    $.ajax({
      dataType: 'json',
      data: data,
      type: 'POST',
      async: false,
      url: 'http://localhost:3000/result'
    });
  });
});


// validate script
// form id == new-Ad
$('#new-Ad').validate({
    onkeyup: false,

    formPhone: {
    required: true,
    remote: {
        url: '/result',
        type: 'POST'
       }
    }
});


// routes.js
result: function(req, res) {
    var form = new formidable.IncomingForm();

    form.parse(req, function(err, fields) {
        var phone = fields.formPhone;

        var query = Ad.find({ 'phone': phone });

        query.exec(function(err, num) {
            if (err)
                throw err;

            if (!num.length) {
                res.status(200).send('true');
            } else if (num.length) {
                res.status(200).send('false');
            }
        });
    });
},