function itl_modify_adduserform(mode, logged_in) {
  if (mode=='have_account') {
    document.getElementById('itl_login_form_table').style.display='block';
    document.getElementById('itl_form_table_mode_login').checked=1;
    document.getElementById('itl_create_customer_submit_tr').style.display='block';
  } else if (document.getElementById('itl_login_form_table')) {
    document.getElementById('itl_login_form_table').style.display='none';
    document.getElementById('itl_form_table_mode_login').checked=0;
    document.getElementById('itl_create_customer_submit_tr').style.display='none';
  }

  if (mode=='create_account') {
    document.getElementById('itl_create_form_table').style.display='block';
    document.getElementById('itl_create_customer_data_form_div').style.display='block';
    document.getElementById('itl_create_customer_data_billing_form_div').style.display='block';
    document.getElementById('itl_create_customer_submit_tr').style.display='block';
    document.getElementById('itl_form_table_mode_create').checked=1;
  } else {
    if (mode=='login_customer' && logged_in) {
    } else {
      document.getElementById('itl_create_customer_data_form_div').style.display='none';
      document.getElementById('itl_create_customer_submit_tr').style.display='none';
      document.getElementById('itl_create_form_table').style.display='none';
    }
    document.getElementById('itl_form_table_mode_create').checked=0;
  }

  if (mode=='login_customer') {
    if (logged_in) {
      document.getElementById('itl_create_customer_data_form_div').style.display='block';
      document.getElementById('itl_create_customer_data_billing_form_div').style.display='none';
      document.getElementById('itl_create_customer_submit_tr').style.display='block';
      document.getElementById('itl_create_form_table').style.display='block';
    }
  
    if (document.getElementById('itl_login_customer_form_table')) document.getElementById('itl_login_customer_form_table').style.display='block';
    document.getElementById('itl_form_table_mode_login_customer').checked=1;
  } else {
    if (document.getElementById('itl_login_customer_form_table')) document.getElementById('itl_login_customer_form_table').style.display='none';
    document.getElementById('itl_form_table_mode_login_customer').checked=0;
  }
  
  return true;
}