function toggleDisabled(html_ids) {
  if(html_ids) {
    if(typeof html_ids == 'string') { html_ids = [html_ids]; }

    for(i in html_ids) {
      var el = document.getElementById(html_ids[i]);
      if(el.disabled == true) {
        el.disabled = false;
        if(el.value == 'N/A') { el.value = ''; }
      } else {
        el.disabled = true;
        if(el.value == '') { el.value = 'N/A'; }
      }
    }
  }
}

function toggleDisablePhoneNumber() {
  toggleDisabled('store_phone_number');
}

function toggleDisablePhysicalLocation() {
  toggleDisabled(['store_physical_street_address', 'store_physical_extended_address', 'store_physical_postal_code']);
}

function toggleDisableMailingLocation() {
  toggleDisabled(['store_mailing_street_address', 'store_mailing_extended_address', 'store_mailing_postal_code']);
}