Open Menu links in new browser window
You don't really need a drupal behavior to do this.  Instead just simple do this:

;(function($){
  $(document).ready(function(){
    $('.page-node-166 a').attr('target', '_blank');
  });
})(jQuery);


or

jQuery(document).ready(function(){
  jQuery('.page-node-166 a').attr('target', '_blank');
});


By default drupal uses jQuery.noConflict() so that it does not interfere with the $ that may be used from other libraries.