function customerRegisterCompany(oRadio, sField)
{
  if(oRadio.value == "company")
  {
    document.getElementsByName(sField)[0].disabled = false;
    document.getElementsByName(sField)[0].className = "field";
  }
  else
  {
    document.getElementsByName(sField)[0].value = "";
    document.getElementsByName(sField)[0].disabled = true;
    document.getElementsByName(sField)[0].className = "disabled";
  }
}