switch (etown_service) {
    case 'weather' :
      var url = 'http://www.etownguide.com/collector/weather.php?client=' + etown_client +
                               '&service=' + etown_service +
                               '&lat=' + etown_lat +
                               '&lon=' + etown_lon;
      break;
    case 'wiki':
      var url = 'http://www.etownguide.com/collector/wiki.php?client=' + etown_client +
                               '&service=' + etown_service +
                               '&search=' + etown_search;
      break;
    default :
      var url = '';                           
}
//document.write(url);
document.write('<script type="text/javascript" src="' + url + '"></script>');