function url_for_update_profile_info_order() {
  return $('url_for_update_profile_info_order').value;
}

Event.observe(window, 'load', function() {
  Sortable.create('profile_items_list', {
    onUpdate: function(e) {
      var p = $('profile_items_list').childElements().map(function(e) {
        return "profile_items[]=" + e.id;
      }).join("&");
      // console.log("Serialized: " + p);
      new Ajax.Request(url_for_update_profile_info_order(), {
        parameters: p
      });
    }
  });
});