function hide_inv_data() {
  var i = document.getElementById('types').getElementsByTagName("input");
  for (j = 0; j < i.length; j++) {
    if ((i[j].name == "data[Shop][shop_type_id]") && (i[j].type == "radio") && (i[j].checked) && (i[j].value == 6)) document.getElementById('invoicing_data').style.display = 'none';
    if ((i[j].name == "data[Shop][shop_type_id]") && (i[j].type == "radio") && (i[j].checked) && (i[j].value != 6)) document.getElementById('invoicing_data').style.display = 'block';
  }
}