commit b78c4f4e3cdae32d6269fe3af8c0077e5a66d890
Author: Brückner Tamás <tamas.bruckner@integralvision.hu>
Date:   Mon Sep 29 10:37:22 2014 +0200

    Add event for autocomplate found.

diff --git a/js/misc/autocomplete.js b/js/misc/autocomplete.js
index 498cdf9..d8ee67a 100644
--- a/js/misc/autocomplete.js
+++ b/js/misc/autocomplete.js
@@ -96,6 +96,8 @@ Drupal.jsAC.prototype.found = function (matches) {
     if (ul.children().length) {
       $(this.popup).empty().append(ul).show();
       $(this.ariaLive).html(Drupal.t('Autocomplete popup'));
+
+      $(this.input).trigger('autocomplete_found');
     }
     else {
       $(this.popup).css({ visibility: 'hidden' });