jQuery(function($) {
  $('#newsletter-form').submit(function(event) {
    event.preventDefault();
    form_data = $(this).serialize();
    
    $.ajax({
      url: '/newsletter/subscribe',
      type: 'post',
      data: form_data,

      success: function(data) {
        alert('Thank you for subscribing!');
      }
    });
  });
});