function contacaratteri(nValue)
{
  maxLength = nValue
  
  document.formIOL.contatore.value = '[' + maxLength + ']'
  
  if (document.formIOL.formIOLmessage.value.length > maxLength)
  {
    document.formIOL.formIOLmessage.value = document.formIOL.formIOLmessage.value.substring(0, maxLength)
    charleft = 0
  }
  else
    charleft = maxLength - document.formIOL.formIOLmessage.value.length

  document.formIOL.contatore.value = '[' + charleft + ']'
}