ex_mobile.channel_menu_select.js

(function($) {
  Drupal.behaviors.channelMenuSelect = {
    attach: function (context, settings) {
      $('#channel-menu-select').change(function() {
        var $path_fragment = $(this).val();

        if (IsNumeric($path_fragment) && $path_fragment != 0) {
          window.location = Drupal.settings.mobile.channelMenuPath + $path_fragment;
        }
      });
    }
  }
}(jQuery));