function history_rollover(year, lang) {
  if (lang == 'it') {
    url = '/incas-group/storia/' + year + '/@@incas_document_content';
  } else if (lang == 'en') {
    url = '/incas-group-es/historia/' + year + '/@@incas_document_content';
  } else if (lang == 'es') {
    url = '/incas-group-en/history/' + year + '/@@incas_document_content';
  }
  new Ajax.Updater('parent-fieldname-text', url);
}