function qb_highlight_missing_values()
{
  var trns_type = document.getElementsByName('trns_type');
  var item_import = document.getElementsByName('item_import');
  var payment_import = document.getElementById('payment_import');
  var customer_import = document.getElementsByName('customer_import');

  var invoice_accnt = document.getElementById('invoice_accnt');
  var payment_accnt = document.getElementById('payment_accnt');
  var cash_accnt = document.getElementById('cash_accnt');
  var item_accnt = document.getElementById('item_accnt'); 

  var single_item_name = document.getElementById('single_item_name');
  var single_customer_name = document.getElementById('single_customer_name');
  var customer_sales_tax = document.getElementById('customer_sales_tax');

  var salestax_item = document.getElementById('salestax_item');
  var salestax_accnt = document.getElementById('salestax_accnt');
  var salestax_agency = document.getElementById('salestax_agency');

  var missing_value = null;

  if (trns_type.length == 0)  // not in products download
  {
    if (item_accnt.value.length == 0)
    {
      item_accnt.style.borderColor = 'red';    
      return item_accnt;
    }
    else
      return null;
  }

  invoice_accnt.style.borderColor = '';
  payment_accnt.style.borderColor = '';
  cash_accnt.style.borderColor = '';
  item_accnt.style.borderColor = '';

  single_item_name.style.borderColor = '';
  single_customer_name.style.borderColor = '';

  salestax_item.style.borderColor = '';
  salestax_accnt.style.borderColor = '';
  salestax_agency.style.borderColor = '';

  if (trns_type[0].checked && invoice_accnt.value.length == 0)
  {
    invoice_accnt.style.borderColor = 'red';
    
    if (missing_value == null)
      missing_value = invoice_accnt;
  }

  if (trns_type[1].checked && cash_accnt.value.length == 0)
  {
    cash_accnt.style.borderColor = 'red';
    
    if (missing_value == null)
      missing_value = cash_accnt;
  }

  if (payment_import.checked && payment_accnt.value.length == 0)
  {
    payment_accnt.style.borderColor = 'red';
    
    if (missing_value == null)
      missing_value = payment_accnt;
  }

  if (item_import[0].checked && item_accnt.value.length == 0)
  {
    item_accnt.style.borderColor = 'red';
    
    if (missing_value == null)
      missing_value = item_accnt;
  }

  if (item_import[1].checked && single_item_name.value.length == 0)
  {
    single_item_name.style.borderColor = 'red';
    
    if (missing_value == null)
      missing_value = single_item_name;
  }

  if (customer_import[1].checked && single_customer_name.value.length == 0)
  {
    single_customer_name.style.borderColor = 'red';
    
    if (missing_value == null)
      missing_value = single_customer_name;
  }

  if (customer_import[0].checked && customer_sales_tax.checked)
  {
    if (salestax_item.value.length == 0)
    {
      salestax_item.style.borderColor = 'red';
    
      if (missing_value == null)
        missing_value = salestax_item;
    }

    if (salestax_accnt.value.length == 0)
    {
      salestax_accnt.style.borderColor = 'red';
    
      if (missing_value == null)
        missing_value = salestax_accnt;
    }

    if (salestax_agency.value.length == 0)
    {
      salestax_agency.style.borderColor = 'red';
    
      if (missing_value == null)
        missing_value = salestax_agency;
    }
  }

  if (salestax_item.value.length > 0)
  {
    if (salestax_accnt.value.length == 0)
    {
      salestax_accnt.style.borderColor = 'red';
    
      if (missing_value == null)
        missing_value = salestax_accnt_name;
    }

    if (salestax_agency.value.length == 0)
    {
      salestax_agency.style.borderColor = 'red';
    
      if (missing_value == null)
        missing_value = salestax_agency_name;
    }
  }

  return missing_value;
}

function qb_validate()
{
  var missing_values = qb_highlight_missing_values();

  if (missing_values != null)
  {
    alert(qb_missing_values);
    missing_values.focus(); // first one
    return false;
  }
  
  return true;
}

function check_qb_configuration(qb_button)
{
  switch (qb_config)
  {
    case 'no':
      alert(qb_configure);
      qb_button.checked = false;
      break;

    case 'ok':
      select_all_fields();
      select_file_extension(qb_button);
      break;
  }
}

function trns_type_changed()
{
  var choices = document.getElementsByName('trns_type');

  if (choices[0].checked)
  {
    var cash_accnt = document.getElementById('cash_accnt');
    cash_accnt.style.borderColor = '';
  }
  else
  if (choices[1].checked)
  {
    var invoice_accnt = document.getElementById('invoice_accnt');
    invoice_accnt.style.borderColor = '';
  }
}

function item_import_changed()
{
  var choices = document.getElementsByName('item_import');

  if (choices[0].checked)
  {
    var single_item_name = document.getElementById('single_item_name');
    single_item_name.style.borderColor = '';
  }
  else
  if (choices[1].checked)
  {
    var item_accnt = document.getElementById('item_accnt'); 
    item_accnt.style.borderColor = '';
  }
}

function customer_import_changed()
{
  var choices = document.getElementsByName('customer_import');

  if (choices[0].checked)
  {
    var single_customer_name = document.getElementById('single_customer_name');
    single_customer_name.style.borderColor = '';
  }
  else
  if (choices[1].checked)
  {
    var salestax_item = document.getElementById('salestax_item');
    var salestax_accnt = document.getElementById('salestax_accnt');
    var salestax_agency = document.getElementById('salestax_agency');
    var customer_sales_tax = document.getElementById('customer_sales_tax');

    customer_sales_tax.checked = false;
    salestax_item.style.borderColor = '';
    salestax_accnt.style.borderColor = '';
    salestax_agency.style.borderColor = '';
  }
}

function customer_sales_tax_changed()
{
  var choices = document.getElementsByName('customer_import');
  var customer_sales_tax = document.getElementById('customer_sales_tax');
  var single_customer_name = document.getElementById('single_customer_name');
  
  if (customer_sales_tax.checked)
  {
    choices[0].checked = true;
    single_customer_name.style.borderColor = '';
  }
  else
  {
    var salestax_item = document.getElementById('salestax_item');
    var salestax_accnt = document.getElementById('salestax_accnt');
    var salestax_agency = document.getElementById('salestax_agency');

    salestax_item.style.borderColor = '';
    salestax_accnt.style.borderColor = '';
    salestax_agency.style.borderColor = '';
  }
}

function default_value(name, value)
{
  document.getElementById(name).value = value;
  return false;
}