function get_url(arg) {
  switch (arg) {
    case 'local':
      return 'http://10.0.1.100:8888/nio_gold/trunk/01_design/02_production/';
      break;
    case 'live':
      return '/';
      break;
    default:
      return 'ERROR!';
      break;
  }
}

urlPrefix = get_url('live');