function region_show()
{
  region = document.getElementById('region_block');
  region.style.display = region.style.display == 'block'? 'none': 'block';
}

function region_country_show(id)
{
  for(CountryID in Countries)
    if(CountryID != id)
      document.getElementById('region_country_'+CountryID).style.display = 'none';

  country = document.getElementById('region_country_'+id);
  country.style.display = country.style.display == 'block'? 'none': 'block';
}