https://akavita.com/sites/all/modules/custom/lang_dropdown/lang_dropdown.js?D

1Drupal.behaviors.langDropdown = function(context) {
2  $('#edit-lang-dropdown-select').change(function() {
3    document.location.href = this.options[this.selectedIndex].value;
4  });
5
6  if (Drupal.settings.langDropdown) {
7    var flags = Drupal.settings.langDropdown.jsWidget.languageicons;
8    if (flags) {
9      $.each(flags, function(index, value) {
10        $('#edit-lang-dropdown-select option[value=' + index + ']').attr('title', value);
11      });
12    }
13
14    var msddSettings = Drupal.settings.langDropdown.jsWidget;
15    $('#edit-lang-dropdown-select').msDropDown({
16      visibleRows: msddSettings.visibleRows,
17      rowHeight: msddSettings.rowHeight,
18      animStyle: msddSettings.animStyle
19    });
20  }
21}