function showhide(selectId, fieldName)
{
  if(fieldName == 'all-countries')
    return; 
     
  myvalue = document.getElementById('billing-all-countries'); 

  if(selectId == 'other'){
    myvalue.style.visibility='visible';
    myvalue.style.display='block';  
  } else {
    myvalue.style.visibility='hidden';
    myvalue.style.display='none';
  }
}