<script>

(function () {
  var cx = '{{ site.google.search_engine_id }}';
  var gcse = document.createElement('script');
  gcse.type = 'text/javascript';
  gcse.async = true;
  gcse.src = 'https://cse.google.com/cse.js?cx=' + cx;
  var s = document.getElementsByTagName('script')[0];
  s.parentNode.insertBefore(gcse, s);
})();

function googleCustomSearchExecute() {
  var input = document.getElementById('lwt-form-search-input');
  var element = google.search.cse.element.getElement('searchresults-only0');
  if (input.value == '') {
    element.clearAllResults();
  } else {
    element.execute(input.value);
  }
  return false;
}

{% if site.google.instant_search %}
  $(document).ready(function () {
    $('input#lwt-form-search-input').on('keyup', function () {
      googleCustomSearchExecute();
    });
  });
{% endif %}

</script>