var earliest_arrival_date   = 1625112000;
var latest_arrival_date     = 1625716800;
var earliest_departure_date = 1625457600;
var latest_departure_date   = 1626408000;
var latest_ext_departure_date = 1626408000;
var conf_start_date_eve     = 1625630400;
var conf_start_date         = 1625716800;
var conf_end_date           = 1625803200;
var pre_conf_start_date_eve = 1625544000;
var pre_conf_start_date     = 1625630400;
var pre_conf_end_date       = 1625630400;
var calc_pre_conf_check_in  = conf_start_date_eve; /* Initially set to the eve of the regular conference, indicating non-attendance to the pre-conference */
var calc_early_check_in     = calc_pre_conf_check_in; /* Initially set to the eve of the regularg conference, indicating no additional early nights */

var captchaVerified         = false;

var date_str_map = {1625112000: 'Thursday, July 1, 2021',1625198400: 'Friday, July 2, 2021',1625284800: 'Saturday, July 3, 2021',1625371200: 'Sunday, July 4, 2021',1625457600: 'Monday, July 5, 2021',1625544000: 'Tuesday, July 6, 2021',1625630400: 'Wednesday, July 7, 2021',1625716800: 'Thursday, July 8, 2021',1625803200: 'Friday, July 9, 2021',1625889600: 'Saturday, July 10, 2021',1625976000: 'Sunday, July 11, 2021',1626062400: 'Monday, July 12, 2021',1626148800: 'Tuesday, July 13, 2021',1626235200: 'Wednesday, July 14, 2021',1626321600: 'Thursday, July 15, 2021',1626408000: 'Friday, July 16, 2021'};

function getDataFromTT (){
  var elChecking = document.getElementById ("timetrack_check");
  var elRegDetail = document.getElementById ("registration_other");
  var checkEmail = document.getElementById ("email").value.trim ();

  captchaVerified = false;

  document.getElementById ("email").value = checkEmail;   // If we did need to trim it, put the trimmed text back in the box.
  elChecking.innerHTML = "Checking TimeTrack for " + checkEmail + "...";

  elChecking.style.display = 'block';
  elRegDetail.style.display = 'none';
  document.getElementById ("timetrack_not_found").style.display = 'none';
  document.getElementById ("timetrack_found").style.display = 'none';

  var url = "email_check.php?t=200&check_email=" + checkEmail;
  makeRequest (url, processEmailCheck);
}

function processEmailCheck (xhr){
  if ( xhr.readyState == 4 ){
    if ( xhr.status == 200 ){
      var checkRetData = JSON.parse (xhr.responseText);
      var elNotFound = document.getElementById ("timetrack_not_found");
      var elFound = document.getElementById ("timetrack_found");

      document.getElementById ("timetrack_check").style.display = 'none';
      document.getElementById ("registration_other").style.display = 'block';

      showMainSections ();

      if ( checkRetData ['error'] == '' ){
        elFound.style.display = 'block';
        elNotFound.style.display = 'none';
        fillTTData (checkRetData);
      }else{
        elFound.style.display = 'none';
        elNotFound.style.display = 'block';
        clearTTData ();
      }
    }else{
      alert ("There was a problem with the request " + xhr.status);
    }
  }
}

function clearTTData (){
  document.getElementById ('first_name').value = '';
  document.getElementById ('last_name').value = '';
  document.getElementById ('cell_phone').value = '';
  document.getElementById ('role_val_1').checked = false;
  document.getElementById ('role_val_6').checked = false;
  document.getElementById ('role_val_7').checked = false;
  document.getElementById ('role_val_8').checked = false;
  document.getElementById ('role_val_13').checked = false;
  document.getElementById ('state').value = '';
  document.getElementById ('district').value = '';
  document.getElementById ('school').value = '';
  document.getElementById ('cohort').value = '';
  
  checkPreConferenceRoleRestrictions ();
}

function fillTTData (d){
  document.getElementById ('first_name').value = d ['first_name'];
  document.getElementById ('last_name').value = d ['last_name'];
  document.getElementById ('cell_phone').value = d ['cell_num'];
  document.getElementById ('role_val_1').checked = d ['admin'];
  document.getElementById ('role_val_6').checked = d ['sam'];
  document.getElementById ('role_val_7').checked = d ['tcc'];
  document.getElementById ('role_val_8').checked = d ['sis'];
  document.getElementById ('role_val_13').checked = d ['tt_admin'];
  document.getElementById ('state').value = d ['state'];
  document.getElementById ('district').value = d ['district'];
  document.getElementById ('school').value = d ['school'];
  document.getElementById ('cohort').value = d ['cohort'];

  checkPreConferenceRoleRestrictions ();
}

function showMainSections (){
  var els = getElementsByClassName ('main_section');
  var elSubmit = document.getElementById ('form_submit');

  for ( var i1 = 0; i1 < els.length; i1++ ){
    els [i1].style.display = 'block';
  }

  elSubmit.disabled = false;
}

function getDateStr ($d){
  return date_str_map [$d];
}

function adjustCheckInDate (){
  var labE = document.getElementById ('check_in_lab');
  var edE = document.getElementById ('check_in');

  // Use the earlier of our calculated check-in dates
  $d = Math.min (calc_pre_conf_check_in, calc_early_check_in);

  edE.value = $d;
  labE.innerHTML = getDateStr ($d);
}

function adjustCheckOutDate ($d){
  var labE = document.getElementById ('check_out_lab');
  var edE = document.getElementById ('check_out');

  edE.value = $d;
  labE.innerHTML = getDateStr ($d);
}

function checkRoleOther (){
  var cbOther = document.getElementById ("role_val_14");
  
  if ( cbOther.checked ){
    replaceClass (document.getElementById ("role_other"), "optional", "required");
    replaceClass (document.getElementById ("role_other_span"), "optional", "required");
  }else{
    replaceClass (document.getElementById ("role_other"), "required", "optional");
    replaceClass (document.getElementById ("role_other_span"), "required", "optional");
    replaceClass (document.getElementById ("role_other"), "required_missed", "optional");
    replaceClass (document.getElementById ("role_other_span"), "required_missed", "optional");
  }
}

function checkLabelEnables (){
  var labels = document.getElementsByTagName ('label');
  
  for ( var i1 = 0; i1 < labels.length; i1++ ){
    if ( labels [i1].getAttribute ('for') != null ){
      if ( document.getElementById (labels [i1].getAttribute ('for')).disabled ){
        labels [i1].className = 'disabled';
      }else{
        labels [i1].className = '';
      }
    }
  }
}

function reenableControls (){
  var els = document.getElementsByTagName ('*');

  for ( var i1 = 0; i1 < els.length; i1++ ){
    if ( els [i1].getAttribute ('disabled') != null ){
      els [i1].disabled = false;
    }
  }
}

function checkEarlyExtraLodgingDays (){
  var elRoomNotNeeded = document.getElementById ("room_needed");
  var elEarlyNights = ['addtl_early_night_1625544000','addtl_early_night_1625457600','addtl_early_night_1625371200','addtl_early_night_1625284800','addtl_early_night_1625198400','addtl_early_night_1625112000'];
  var foundUnchecked = false;

  calc_early_check_in = conf_start_date_eve;
  for ( var i1 = 0; i1 < elEarlyNights.length; i1++ ){
    var el = document.getElementById (elEarlyNights [i1]);

    if ( el.checked ){
      // Ensure this checkbox is enabled
      el.disabled = false;
      calc_early_check_in = el.value;
    }else{
      // This is the first unchecked box, so ensure this checkbox is enabled, and uncheck and disable any boxes that come after it.
      el.disabled = false;
      foundUnchecked = true;
      for ( var i2 = i1 + 1; i2 < elEarlyNights.length; i2++ ){
        var el2 = document.getElementById (elEarlyNights [i2]);

        el2.checked = false;
        el2.disabled = true;
      }
      // We have adjusted all elements that come after this one, so bail out of the main loop.
      break;
    }
  }

  if ( elRoomNotNeeded.checked ){
    // If we don't need a room, force adjust the check in date to the day before the conference (i.e. no early check-in).
    calc_early_check_in = conf_start_date_eve;
  }

  adjustCheckInDate ();

  checkLabelEnables ();
}

function checkExtraLodgingDays (){
  var elRoomNotNeeded = document.getElementById ("room_needed");
  var elNights = ['addtl_night_1625889600','addtl_night_1625976000','addtl_night_1626062400','addtl_night_1626148800','addtl_night_1626235200','addtl_night_1626321600'];
  var foundUnchecked = false;
  
  for ( var i1 = 0; i1 < elNights.length; i1++ ){
    var el = document.getElementById (elNights [i1]);

    if ( el.checked ){
      // Ensure this checkbox is enabled
      el.disabled = false;
    }else{
      // This is the first unchecked box, so ensure this checkbox is enabled, and uncheck and disable any boxes that come after it.
      el.disabled = false;
      adjustCheckOutDate (el.value);
      foundUnchecked = true;
      for ( var i2 = i1 + 1; i2 < elNights.length; i2++ ){
        var el2 = document.getElementById (elNights [i2]);

        el2.checked = false;
        el2.disabled = true;
      }
      // We have adjusted all elements that come after this one, so bail out of the main loop.
      break;
    }
  }

  if ( ! foundUnchecked ){
    adjustCheckOutDate (latest_ext_departure_date);
  }

  if ( elRoomNotNeeded.checked ){
    // If we don't need a room, force adjust the check out date to the last day of the conference.
    adjustCheckOutDate (1625803200);
  }

  checkLabelEnables ();
}

function getElementsStartsWithId (id){
  var children = document.body.getElementsByTagName ('*');
  var elements = [], child;

  for ( var i = 0, length = children.length; i < length; i++ ){
    child = children[i];
    if ( child.id.substr (0, id.length) == id ){
      elements.push (child);
    }
  }
  
  return elements;
}

function getElementsByClassName (matchClass){
  var elems = document.getElementsByTagName ('*'), elements = [], i;

  for ( i in elems ){
    if ( (' ' + elems [i].className + ' ').indexOf (' ' + matchClass + ' ') > -1 ){
      elements.push (elems [i]);
    }
  }

  return elements;
}

function resetMissedFields (){
  var els = getElementsByClassName ('required_missed');

  for ( var i1 = 0; i1 < els.length; i1++ ){
    replaceClass (els [i1], 'required_missed', 'required');
  }
}

function replaceClass (el, oldClass, newClass){
  var thisClass = (' ' + el.className + ' ');  // Add padding spaces to make sure that we can find whole class names.
  
  if ( thisClass.indexOf (' ' + oldClass + ' ') == -1 ){
    // The old class isn't in the class list for this element.
    return;
  }

  var tOldClass = ' ' + oldClass + ' ';
  var tNewClass = ' ' + newClass + ' ';
  while ( thisClass.indexOf (' ' + oldClass + ' ') > -1 ){
    thisClass = thisClass.replace (tOldClass, tNewClass);
  }
  
  el.className = thisClass.trim ();
}

function checkPreConference (){
  var elRoomNotNeeded = document.getElementById ("room_needed");
  var elUsed = document.getElementById ('pre_conf_used');
  var elNotUsed = document.getElementById ('pre_conf_not_used');
  var els = getElementsStartsWithId ('pre_conf_events_');
  var eventEls = getElementsStartsWithId ('pre_conf_event_');
  var i1;
  
  if ( elUsed.checked ){
    calc_pre_conf_check_in = pre_conf_start_date_eve;
  }else{
    calc_pre_conf_check_in = conf_start_date_eve;
  }

  if ( elRoomNotNeeded.checked ){
    // If we don't need a room, force adjust the check in date to the first event evening day, independent of whether they are going to the pre-conference or not.
    // (If they are not attending the pre-conference, they are still welcome to come to the event the on the pre-conference day, and if they're going to the pre-conference, there is no event the day before the pre-conference, so there's no reason for them to check-in the day/night before the pre-conference.)
    calc_pre_conf_check_in = conf_start_date_eve;
  }
  adjustCheckInDate ();

  for ( i1 = 0; i1 < els.length; i1++ ){
    if ( elUsed.checked ){
      replaceClass (els [i1], "optional", "required");
      replaceClass (els [i1], "required_missed", "required");
    }else{
      replaceClass (els [i1], "required", "optional");
      replaceClass (els [i1], "required_missed", "optional");
    }
  }
  if ( elUsed.checked ){
    replaceClass (document.getElementById ('pre_conf_coverage'), "optional", "required");
    replaceClass (document.getElementById ('pre_conf_coverage'), "required_missed", "required");
    replaceClass (document.getElementById ('pre_conf_coverage_span'), "optional", "required");
    replaceClass (document.getElementById ('pre_conf_coverage_span'), "required_missed", "required");
  }else{
    replaceClass (document.getElementById ('pre_conf_coverage'), "required", "optional");
    replaceClass (document.getElementById ('pre_conf_coverage'), "required_missed", "optional");
    replaceClass (document.getElementById ('pre_conf_coverage_span'), "required", "optional");
    replaceClass (document.getElementById ('pre_conf_coverage_span'), "required_missed", "optional");
  }

  for ( i1 = 0; i1 < eventEls.length; i1++ ){
    if ( elUsed.checked ){
//      eventEls [i1].disabled = false;
    }else{
//      eventEls [i1].disabled = true;
      eventEls [i1].checked = false;
    }
  }
  
  checkLabelEnables ();
}

function checkPreConferenceRoleRestrictions (){
  var selectedRoles = [];
  var roleEls = getElementsStartsWithId ('role_val_');
  var preConfEventEls = getElementsStartsWithId ('pre_conf_event_');
  var preConfEventsWithRestriction = [];
  var preConfEventsWithRequirements = [];
  var i1;

  // Start off by making sure everything is enabled, and then disable things as needed below.
  document.getElementById ('pre_conf_used').disabled = false;
  for ( i1 = 0; i1 < preConfEventEls.length; i1++ ){
    preConfEventEls [i1].disabled = false;
  }

  for ( i1 = 0; i1 < roleEls.length; i1++ ){
    if ( roleEls [i1].checked ){
      selectedRoles.push (roleEls [i1].value);
    }
  }

  // Find restricted events and events that are required.
  for ( i1 = 0; i1 < preConfEventEls.length; i1++ ){
    if ( preConfEventEls [i1].getAttribute ('restrict_to_roles') != null ){
      preConfEventsWithRestriction.push (preConfEventEls [i1]);
    }
    if ( preConfEventEls [i1].getAttribute ('require_for_roles') != null ){
      preConfEventsWithRequirements.push (preConfEventEls [i1]);
    }
  }

  // Apply restrictions based on currently selected roles.
  for ( i1 = 0; i1 < preConfEventsWithRestriction.length; i1++ ){
    var restrictions = preConfEventsWithRestriction [i1].getAttribute ('restrict_to_roles');
    var allowed = false;
    
    for ( var i2 = 0; i2 < selectedRoles.length; i2++ ){
      if ( (',' + restrictions + ',').indexOf (',' + selectedRoles [i2] + ',') > -1 ){
        // One of the roles selected is in the "restricted to" list, so we can allow this event to be selected.  No need to continue.
        allowed = true;
        break;
      }
    }
    
    if ( allowed ){
      preConfEventsWithRestriction [i1].disabled = false;
    }else{
      preConfEventsWithRestriction [i1].disabled = true;
      preConfEventsWithRestriction [i1].checked = false;
    }
  }

  // Apply requirements based on currently selected roles.
  var foundRequirement = false;
  var requiredEventEls = [];
  for ( i1 = 0; i1 < preConfEventsWithRequirements.length; i1++ ){
    var requirements = preConfEventsWithRequirements [i1].getAttribute ('require_for_roles');
    var required = false;

    for ( var i2 = 0; i2 < selectedRoles.length; i2++ ){
      if ( (',' + requirements + ',').indexOf (',' + selectedRoles [i2] + ',') > -1 ){
        // One of the roles selected is in the "restricted to" list, so we can allow this event to be selected.  No need to continue.
        required = true;
        break;
      }
    }

    if ( required ){
      foundRequirement = true;
      requiredEventEls.push (preConfEventsWithRequirements [i1]);
      preConfEventsWithRequirements [i1].disabled = false;
      preConfEventsWithRequirements [i1].checked = true;
    }
  }
  
  if ( foundRequirement ){
    document.getElementById ('pre_conf_used').disabled = true;
    document.getElementById ('pre_conf_not_used').disabled = true;
    for ( i1 = 0; i1 < preConfEventEls.length; i1++ ){
      var exclude = false;
      for ( var i2 = 0; i2 < requiredEventEls.length; i2++ ){
        if ( requiredEventEls [i2].id == preConfEventEls [i1].id ){
          exclude = true;
          break;
        }
      }
      if ( ! exclude ){
        preConfEventEls [i1].disabled = true;
      }
    }
  }
  
  // If we forced any sessions, make sure that the pre-conference box is checked.
  if ( ! document.getElementById ('pre_conf_used').checked ){
    for ( i1 = 0; i1 < preConfEventEls.length; i1++ ){
      if ( preConfEventEls [i1].checked ){
        document.getElementById ('pre_conf_used').checked = true;
        break;
      }
    }
  }
  checkPreConference ();
  checkLabelEnables ();
}

function preConferenceEventChecked (){
  // If the user selects a pre-conference, then force the Checkbox for the pre-conference to be checked.
  if ( document.getElementById ('pre_conf_used').checked ){
    // Already checked, so nothing to do.
    return;
  }
  document.getElementById ('pre_conf_used').checked = true;
  checkPreConference ();
}

function checkSharingDates (idx){
  var elShare = document.getElementById ("share_" + idx + "_dates");
  var elShareDetail = document.getElementById ("share_" + idx + "_dates_detail");

  elShareDetail.style.display = ( ! elShare.checked ? 'block' : 'none' );
}

function checkSharing (){
  var elShare = document.getElementById ("sharing");
  var elShareDetail = document.getElementById ("sharing_detail");

  elShareDetail.style.display = ( elShare.checked ? 'block' : 'none' );

  checkSharingDates (0);
}

function checkAirTransportation (){
  var elAirTransArrive = document.getElementById ("air_trans_arrive_used");
  var elDrivingArrive = document.getElementById ("air_trans_arrive_not_used");
  var elAirTransDepart = document.getElementById ("air_trans_depart_used");
  var elDrivingDepart = document.getElementById ("air_trans_depart_not_used");
  var elAirTransArriveDetail = document.getElementById ("air_trans_arrive_detail");
  var elDrivingArriveDetail = document.getElementById ("driving_arrive_detail");
  var elAirTransDepartDetail = document.getElementById ("air_trans_depart_detail");
  var elDrivingDepartDetail = document.getElementById ("driving_depart_detail");

  elAirTransArriveDetail.style.display = ( elAirTransArrive.checked ? 'block' : 'none' );
  elDrivingArriveDetail.style.display = ( elDrivingArrive.checked ? 'block' : 'none' );
  elAirTransDepartDetail.style.display = ( elAirTransDepart.checked ? 'block' : 'none' );
  elDrivingDepartDetail.style.display = ( elDrivingDepart.checked ? 'block' : 'none' );
}

function checkGroundTransportation (){
  var elArrival = document.getElementById ("ground_arrival_needs");
  var elArrivalDetail = document.getElementById ("ground_arrival_needs_detail");

  elArrivalDetail.style.display = ( elArrival.value == 2 ? 'block' : 'none' );
  
  var elDeparture = document.getElementById ("ground_departure_needs");
  var elDepartureDetail = document.getElementById ("ground_departure_needs_detail");

  elDepartureDetail.style.display = ( elDeparture.value == 2 ? 'block' : 'none' );

  var elAirTransArrive = document.getElementById ("air_trans_arrive_used");
  var elDrivingArrive = document.getElementById ("air_trans_arrive_not_used");

  document.getElementById ('arrival_date').disabled = false;
  document.getElementById ('arrival_date_driving').disabled = false;
  switch ( parseInt (elArrival.options [elArrival.selectedIndex].value) ){
    case 0 :
      elDrivingArrive.checked = true;
      break;
    case 1 :
      elAirTransArrive.checked = true;
      break;
    case 2 :
      elDrivingArrive.checked = true;
      break;
    case 3 :
      elDrivingArrive.checked = true;
      document.getElementById ('arrival_date').value = '1625630400';
      document.getElementById ('arrival_date').disabled = true;
      document.getElementById ('arrival_date_driving').value = '1625630400';
      document.getElementById ('arrival_date_driving').disabled = true;
      break;
  }

  var elAirTransDepart = document.getElementById ("air_trans_depart_used");
  var elDrivingDepart = document.getElementById ("air_trans_depart_not_used");

  document.getElementById ('departure_date').disabled = false;
  document.getElementById ('departure_date_driving').disabled = false;
  switch ( parseInt (elDeparture.options [elDeparture.selectedIndex].value) ){
    case 0 :
      elDrivingDepart.checked = true;
      break;
    case 1 :
      elAirTransDepart.checked = true;
      break;
    case 2 :
      elDrivingDepart.checked = true;
      break;
    case 3 :
      elDrivingDepart.checked = true;
      document.getElementById ('departure_date').value = '1625889600';
      document.getElementById ('departure_date').disabled = true;
      document.getElementById ('departure_date_driving').value = '1625889600';
      document.getElementById ('departure_date_driving').disabled = true;
      break;
  }

  checkAirTransportation ();
}

function checkLodging (){
  var elRoomNotNeeded = document.getElementById ("room_needed");
  var elLodgingDetail = document.getElementById ("lodging_detail");

  elLodgingDetail.style.display = ( elRoomNotNeeded.checked ? 'none' : 'block' );

  if ( elRoomNotNeeded.checked ){
    // If we don't need a room, make sure that we are not specifying additional nights.
    var elEarlyNights = ['addtl_early_night_1625544000','addtl_early_night_1625457600','addtl_early_night_1625371200','addtl_early_night_1625284800','addtl_early_night_1625198400','addtl_early_night_1625112000'];
    var elNights = ['addtl_night_1625889600','addtl_night_1625976000','addtl_night_1626062400','addtl_night_1626148800','addtl_night_1626235200','addtl_night_1626321600'];

    for ( var i1 = 0; i1 < elEarlyNights.length; i1++ ){
      var el = document.getElementById (elEarlyNights [i1]);

      el.checked = false;
    }
    for ( var i1 = 0; i1 < elNights.length; i1++ ){
      var el = document.getElementById (elNights [i1]);

      el.checked = false;
    }
  }

  // Then make sure to update the estimated check-in/out dates and additional night enabled/disabled.
  checkEarlyExtraLodgingDays ();
  checkExtraLodgingDays ();
  checkPreConference ();
}

function checkGuest (){
  var elGuest = document.getElementById ("guest");
  var elGuestDetail = document.getElementById ("guest_detail");

  elGuestDetail.style.display = ( elGuest.checked ? 'block' : 'none' );

  if ( elGuest.checked ){
    if ( document.getElementById ("guest_0_travel").checked ){
      replaceClass (document.getElementById ("guest_0_email"), "required", "optional");
      replaceClass (document.getElementById ("guest_0_email_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_0_phone_cell"), "required", "optional");
      replaceClass (document.getElementById ("guest_0_phone_cell_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_0_email"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_0_email_span"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_0_phone_cell"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_0_phone_cell_span"), "required_missed", "optional");
    }else{
      replaceClass (document.getElementById ("guest_0_email"), "optional", "required");
      replaceClass (document.getElementById ("guest_0_email_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_0_phone_cell"), "optional", "required");
      replaceClass (document.getElementById ("guest_0_phone_cell_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_0_email"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_0_email_span"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_0_phone_cell"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_0_phone_cell_span"), "required_missed", "required");
    }
    if (( document.getElementById ("guest_1_travel").checked ) || ( document.getElementById ("guest_1_name").value == "" )){
      replaceClass (document.getElementById ("guest_1_email"), "required", "optional");
      replaceClass (document.getElementById ("guest_1_email_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_1_phone_cell"), "required", "optional");
      replaceClass (document.getElementById ("guest_1_phone_cell_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_1_email"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_1_email_span"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_1_phone_cell"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_1_phone_cell_span"), "required_missed", "optional");
    }else{
      replaceClass (document.getElementById ("guest_1_email"), "optional", "required");
      replaceClass (document.getElementById ("guest_1_email_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_1_phone_cell"), "optional", "required");
      replaceClass (document.getElementById ("guest_1_phone_cell_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_1_email"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_1_email_span"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_1_phone_cell"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_1_phone_cell_span"), "required_missed", "required");
    }
    if (( document.getElementById ("guest_2_travel").checked ) || ( document.getElementById ("guest_2_name").value == "" )){
      replaceClass (document.getElementById ("guest_2_email"), "required", "optional");
      replaceClass (document.getElementById ("guest_2_email_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_2_phone_cell"), "required", "optional");
      replaceClass (document.getElementById ("guest_2_phone_cell_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_2_email"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_2_email_span"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_2_phone_cell"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_2_phone_cell_span"), "required_missed", "optional");
    }else{
      replaceClass (document.getElementById ("guest_2_email"), "optional", "required");
      replaceClass (document.getElementById ("guest_2_email_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_2_phone_cell"), "optional", "required");
      replaceClass (document.getElementById ("guest_2_phone_cell_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_2_email"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_2_email_span"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_2_phone_cell"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_2_phone_cell_span"), "required_missed", "required");
    }
    if (( document.getElementById ("guest_3_travel").checked ) || ( document.getElementById ("guest_3_name").value == "" )){
      replaceClass (document.getElementById ("guest_3_email"), "required", "optional");
      replaceClass (document.getElementById ("guest_3_email_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_3_phone_cell"), "required", "optional");
      replaceClass (document.getElementById ("guest_3_phone_cell_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_3_email"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_3_email_span"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_3_phone_cell"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_3_phone_cell_span"), "required_missed", "optional");
    }else{
      replaceClass (document.getElementById ("guest_3_email"), "optional", "required");
      replaceClass (document.getElementById ("guest_3_email_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_3_phone_cell"), "optional", "required");
      replaceClass (document.getElementById ("guest_3_phone_cell_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_3_email"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_3_email_span"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_3_phone_cell"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_3_phone_cell_span"), "required_missed", "required");
    }
    if (( document.getElementById ("guest_4_travel").checked ) || ( document.getElementById ("guest_4_name").value == "" )){
      replaceClass (document.getElementById ("guest_4_email"), "required", "optional");
      replaceClass (document.getElementById ("guest_4_email_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_4_phone_cell"), "required", "optional");
      replaceClass (document.getElementById ("guest_4_phone_cell_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_4_email"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_4_email_span"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_4_phone_cell"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_4_phone_cell_span"), "required_missed", "optional");
    }else{
      replaceClass (document.getElementById ("guest_4_email"), "optional", "required");
      replaceClass (document.getElementById ("guest_4_email_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_4_phone_cell"), "optional", "required");
      replaceClass (document.getElementById ("guest_4_phone_cell_span"), "optional", "required");
      replaceClass (document.getElementById ("guest_4_email"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_4_email_span"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_4_phone_cell"), "required_missed", "required");
      replaceClass (document.getElementById ("guest_4_phone_cell_span"), "required_missed", "required");
    }
  }
}

function validateForm (){
  var missCnt = 0;
  var msgs = [];
  
  resetMissedFields ();
  
  // Registrant Section
  document.getElementById ("email").value = document.getElementById ("email").value.trim ();
  if ( document.getElementById ("email").value == "" ){
    replaceClass (document.getElementById ("email"), "required", "required_missed");
    replaceClass (document.getElementById ("email_span"), "required", "required_missed");
    missCnt++;
  }
  document.getElementById ("first_name").value = document.getElementById ("first_name").value.trim ();
  if ( document.getElementById ("first_name").value == "" ){
    replaceClass (document.getElementById ("first_name"), "required", "required_missed");
    replaceClass (document.getElementById ("first_name_span"), "required", "required_missed");
    missCnt++;
  }
  document.getElementById ("last_name").value = document.getElementById ("last_name").value.trim ();
  if ( document.getElementById ("last_name").value == "" ){
    replaceClass (document.getElementById ("last_name"), "required", "required_missed");
    replaceClass (document.getElementById ("last_name_span"), "required", "required_missed");
    missCnt++;
  }
  var roleCnt = 0;
  if ( document.getElementById ("role_val_1").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_2").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_3").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_4").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_5").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_6").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_7").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_8").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_9").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_10").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_11").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_12").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_13").checked ){
    roleCnt++;
  }
  if ( document.getElementById ("role_val_14").checked ){
    roleCnt++;
    document.getElementById ("role_other").value = document.getElementById ("role_other").value.trim ();
    if ( document.getElementById ("role_other").value == "" ){
      replaceClass (document.getElementById ("role_other"), "required", "required_missed");
      replaceClass (document.getElementById ("role_other_span"), "required", "required_missed");
      missCnt++;
    }
  }
  if ( roleCnt == 0 ){
    replaceClass (document.getElementById ("role_ul"), "required", "required_missed");
    missCnt++;
  }
  document.getElementById ("state").value = document.getElementById ("state").value.trim ();
  if ( document.getElementById ("state").value == "" ){
    replaceClass (document.getElementById ("state"), "required", "required_missed");
    replaceClass (document.getElementById ("state_span"), "required", "required_missed");
    missCnt++;
  }
  document.getElementById ("daytime_phone").value = document.getElementById ("daytime_phone").value.trim ();
  if ( document.getElementById ("daytime_phone").value == "" ){
    replaceClass (document.getElementById ("daytime_phone"), "required", "required_missed");
    replaceClass (document.getElementById ("daytime_phone_span"), "required", "required_missed");
    missCnt++;
  }
  document.getElementById ("cell_phone").value = document.getElementById ("cell_phone").value.trim ();
  if ( document.getElementById ("cell_phone").value == "" ){
    replaceClass (document.getElementById ("cell_phone"), "required", "required_missed");
    replaceClass (document.getElementById ("cell_phone_span"), "required", "required_missed");
    missCnt++;
  }
  
  // Conference Section
  var elConfCover = document.getElementById ("conf_coverage");
  switch ( parseInt (elConfCover.options [elConfCover.selectedIndex].value) ){
    default :
      // We have an unknown choice
      replaceClass (document.getElementById ("conf_coverage"), "required", "required_missed");
      replaceClass (document.getElementById ("conf_coverage_span"), "required", "required_missed");
      missCnt++;
      break;

    case 0 :
    case 1 :
    case 2 :
    case 3 :
      // Any of these are valid options, and need no further validation.
      break;
  }

  if (( ! document.getElementById ("pre_conf_used").checked ) && ( ! document.getElementById ("pre_conf_not_used").checked )){
    // Must indicate whether attending the pre-conference, or not
    replaceClass (document.getElementById ("pre_conf_ul"), "required", "required_missed");
    missCnt++;
  }
  if ( document.getElementById ("pre_conf_used").checked ){
    var elPreConfCover = document.getElementById ("pre_conf_coverage");
    switch ( parseInt (elPreConfCover.options [elPreConfCover.selectedIndex].value) ){
      default :
        // We have an unknown choice
        replaceClass (document.getElementById ("pre_conf_coverage"), "required", "required_missed");
        replaceClass (document.getElementById ("pre_conf_coverage_span"), "required", "required_missed");
        missCnt++;
        break;

      case 0 :
      case 1 :
      case 2 :
      case 3 :
        // Any of these are valid options, and need no further validation.
        break;
    }
    var events_1625630400_cnt = 0;

    if ( document.getElementById ("pre_conf_event_1").checked ){
      events_1625630400_cnt++;
    }
    if ( document.getElementById ("pre_conf_event_4").checked ){
      events_1625630400_cnt++;
    }
    if ( document.getElementById ("pre_conf_event_5").checked ){
      events_1625630400_cnt++;
    }
    if ( events_1625630400_cnt == 0 ){
      replaceClass (document.getElementById ("pre_conf_events_1625630400"), "required", "required_missed");
      missCnt++;
    }

  }

  // Lodging Section
  if ( document.getElementById ("sharing").checked ){
    document.getElementById ("share_0_email").value = document.getElementById ("share_0_email").value.trim ();
    document.getElementById ("share_0_name").value = document.getElementById ("share_0_name").value.trim ();
    if ( document.getElementById ("share_0_name").value == "" ){
      replaceClass (document.getElementById ("share_0_name"), "required", "required_missed");
      replaceClass (document.getElementById ("share_0_name_span"), "required", "required_missed");
      missCnt++;
    }
    if ( ! document.getElementById ("share_0_dates").checked ){
      var foundOtherError = false;
      var elFirst = document.getElementById ("share_0_dates_first");
      if ( elFirst.selectedIndex == -1 ){
        replaceClass (document.getElementById ("share_0_dates_first"), "required", "required_missed");
        replaceClass (document.getElementById ("share_0_dates_first_span"), "required", "required_missed");
        missCnt++;
        foundOtherError = true;
      }else if ( parseInt (elFirst.options [elFirst.selectedIndex].value) == 0 ){
        replaceClass (document.getElementById ("share_0_dates_first"), "required", "required_missed");
        replaceClass (document.getElementById ("share_0_dates_first_span"), "required", "required_missed");
        missCnt++;
        foundOtherError = true
      }

      var elLast = document.getElementById ("share_0_dates_last");
      if ( elLast.selectedIndex == -1 ){
        replaceClass (document.getElementById ("share_0_dates_last"), "required", "required_missed");
        replaceClass (document.getElementById ("share_0_dates_last_span"), "required", "required_missed");
        missCnt++;
        foundOtherError = true;
      }else if ( parseInt (elLast.options [elLast.selectedIndex].value) == 0 ){
        replaceClass (document.getElementById ("share_0_dates_last"), "required", "required_missed");
        replaceClass (document.getElementById ("share_0_dates_last_span"), "required", "required_missed");
        missCnt++;
        foundOtherError = true;
      }
      
      if ( ! foundOtherError ){
        if ( parseInt (elLast.options [elLast.selectedIndex].value) < parseInt (elFirst.options [elFirst.selectedIndex].value) ){
          replaceClass (document.getElementById ("share_0_dates_first"), "required", "required_missed");
          replaceClass (document.getElementById ("share_0_dates_first_span"), "required", "required_missed");
          replaceClass (document.getElementById ("share_0_dates_last"), "required", "required_missed");
          replaceClass (document.getElementById ("share_0_dates_last_span"), "required", "required_missed");
          missCnt++;
          msgs.push ("When sharing a room, the Last Night Sharing cannot come before the First Night Sharing.");
        }
      }
    }

  }
  
  // Transportation Section
  // Arrival
  if (( ! document.getElementById ("air_trans_arrive_used").checked ) && ( ! document.getElementById ("air_trans_arrive_not_used").checked )){
    // Must indicate whether flying or driving
    replaceClass (document.getElementById ("air_trans_arrive_ul"), "required", "required_missed");
    missCnt++;
  }

  // Depart
  if (( ! document.getElementById ("air_trans_depart_used").checked ) && ( ! document.getElementById ("air_trans_depart_not_used").checked )){
    // Must indicate whether flying or driving
    replaceClass (document.getElementById ("air_trans_depart_ul"), "required", "required_missed");
    missCnt++;
  }

  var elGroundArrive = document.getElementById ("ground_arrival_needs");
  var flightMsgSet = false;
  var groundMsgSet = false;

  switch ( parseInt (elGroundArrive.options [elGroundArrive.selectedIndex].value) ){
    default :
      // We have an unknown choice
      replaceClass (document.getElementById ("ground_arrival_needs"), "required", "required_missed");
      replaceClass (document.getElementById ("ground_arrival_needs_span"), "required", "required_missed");
      missCnt++;
      break;

    case 0 :
      // This is the case for not needing transportation, so nothing to check.
      break;

    case 1 :
      // This is the case for matching the arriving flights.
      // So, make sure they have at least specified they will be using air transportation.
      if ( ! document.getElementById ("air_trans_arrive_used").checked ){
        replaceClass (document.getElementById ("ground_arrival_needs"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_arrival_needs_span"), "required", "required_missed");
        missCnt++;
        msgs.push ("If you need ground transportation to match your flight arrival/depature, make sure to indicate you will be flying to/from the conference, even if you don't have specific flight information, yet.");
        flightMsgSet = true;
      }
      break;

    case 3 :
      break;

    case 2 :
      // This is the case for not needing transportation at a specific time.
      var el1 = document.getElementById ("ground_arrival_date_hour");
      var el2 = document.getElementById ("ground_arrival_date_min");
      var el3 = document.getElementById ("ground_arrival_date_ampm");

      if ( el1.options [el1.selectedIndex].value == "" ){
        replaceClass (document.getElementById ("ground_arrival_date_hour"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_arrival_time_span"), "required", "required_missed");
        missCnt++;
        if ( ! groundMsgSet ){
          msgs.push ("If you need ground transportation at a specific time, please indicate the specific time needed.");
          groundMsgSet = true;
        }
      }
      if ( el2.options [el2.selectedIndex].value == "" ){
        replaceClass (document.getElementById ("ground_arrival_date_min"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_arrival_time_span"), "required", "required_missed");
        missCnt++;
        if ( ! groundMsgSet ){
          msgs.push ("If you need ground transportation at a specific time, please indicate the specific time needed.");
          groundMsgSet = true;
        }
      }
      if ( el3.options [el3.selectedIndex].value == "" ){
        replaceClass (document.getElementById ("ground_arrival_date_ampm"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_arrival_time_span"), "required", "required_missed");
        missCnt++;
        if ( ! groundMsgSet ){
          msgs.push ("If you need ground transportation at a specific time, please indicate the specific time needed.");
          groundMsgSet = true;
        }
      }
      break;
  }
  
  var elGroundDepart = document.getElementById ("ground_departure_needs");

  switch ( parseInt (elGroundDepart.options [elGroundDepart.selectedIndex].value) ){
    default :
      // We have an unknown choice
      replaceClass (document.getElementById ("ground_departure_needs"), "required", "required_missed");
      replaceClass (document.getElementById ("ground_departure_needs_span"), "required", "required_missed");
      missCnt++;
      break;

    case 0 :
      // This is the case for not needing transportation, so nothing to check.
      break;

    case 1 :
      // This is the case for matching the departing flights.
      // So, make sure they have at least specified they will be using air transportation.
      if ( ! document.getElementById ("air_trans_depart_used").checked ){
        replaceClass (document.getElementById ("ground_departure_needs"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_departure_needs_span"), "required", "required_missed");
        missCnt++;
        if ( ! flightMsgSet ){
          msgs.push ("If you need ground transportation to match your flight arrival/depature, make sure to indicate you will be flying to/from the conference, even if you don't have specific flight information, yet.");
          flightMsgSet = true;
        }
      }
      break;

    case 3 :
      break;

    case 2 :
      // This is the case for not needing transportation at a specific time.
      var el1 = document.getElementById ("ground_departure_date_hour");
      var el2 = document.getElementById ("ground_departure_date_min");
      var el3 = document.getElementById ("ground_departure_date_ampm");

      if ( el1.options [el1.selectedIndex].value == "" ){
        replaceClass (document.getElementById ("ground_departure_date_hour"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_departure_time_span"), "required", "required_missed");
        missCnt++;
        if ( ! groundMsgSet ){
          msgs.push ("If you need ground transportation at a specific time, please indicate the specific time needed.");
          groundMsgSet = true;
        }
      }
      if ( el2.options [el2.selectedIndex].value == "" ){
        replaceClass (document.getElementById ("ground_departure_date_min"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_departure_time_span"), "required", "required_missed");
        missCnt++;
        if ( ! groundMsgSet ){
          msgs.push ("If you need ground transportation at a specific time, please indicate the specific time needed.");
          groundMsgSet = true;
        }
      }
      if ( el3.options [el3.selectedIndex].value == "" ){
        replaceClass (document.getElementById ("ground_departure_date_ampm"), "required", "required_missed");
        replaceClass (document.getElementById ("ground_departure_time_span"), "required", "required_missed");
        missCnt++;
        if ( ! groundMsgSet ){
          msgs.push ("If you need ground transportation at a specific time, please indicate the specific time needed.");
          groundMsgSet = true;
        }
      }
      break;
  }

  // Guest Section
  if ( document.getElementById ("guest").checked ){
    document.getElementById ("guest_0_email").value = document.getElementById ("guest_0_email").value.trim ();
    document.getElementById ("guest_0_phone_cell").value = document.getElementById ("guest_0_phone_cell").value.trim ();
    document.getElementById ("guest_0_name").value = document.getElementById ("guest_0_name").value.trim ();
//    document.getElementById ("guest_0_relation").value = document.getElementById ("guest_0_relation").value.trim ();
    if ( document.getElementById ("guest_0_name").value == "" ){
      replaceClass (document.getElementById ("guest_0_name"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_0_name_span"), "required", "required_missed");
      missCnt++;
    }
/*
    if ( document.getElementById ("guest_0_relation").value == "" ){
      replaceClass (document.getElementById ("guest_0_relation"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_0_relation_span"), "required", "required_missed");
      missCnt++;
    }
*/
    if ( ! document.getElementById ("guest_0_travel").checked ){
      if ( document.getElementById ("guest_0_email").value == "" ){
        replaceClass (document.getElementById ("guest_0_email"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_0_email_span"), "required", "required_missed");
        missCnt++;
      }
      if ( document.getElementById ("guest_0_phone_cell").value == "" ){
        replaceClass (document.getElementById ("guest_0_phone_cell"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_0_phone_cell_span"), "required", "required_missed");
        missCnt++;
      }
    }

    document.getElementById ("guest_1_email").value = document.getElementById ("guest_1_email").value.trim ();
    document.getElementById ("guest_1_phone_cell").value = document.getElementById ("guest_1_phone_cell").value.trim ();
    document.getElementById ("guest_1_name").value = document.getElementById ("guest_1_name").value.trim ();
//    document.getElementById ("guest_1_relation").value = document.getElementById ("guest_1_relation").value.trim ();
    if (( document.getElementById ("guest_1_email").value != "" ) || ( document.getElementById ("guest_1_phone_cell").value != "" )){
      // If we have an email address or phone number for a guest, we have to have a name and relation as well
      replaceClass (document.getElementById ("guest_1_name"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_1_name_span"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_1_name"), "optional", "required_missed");
      replaceClass (document.getElementById ("guest_1_name_span"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_1_relation"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_1_relation_span"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_1_relation"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_1_relation_span"), "optional", "required_missed");
      missCnt++;
    }else{
      // Make sure to reset this special case back to "optional"
      replaceClass (document.getElementById ("guest_1_name"), "required", "optional");
      replaceClass (document.getElementById ("guest_1_name_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_1_name"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_1_name_span"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_1_relation"), "required", "optional");
//      replaceClass (document.getElementById ("guest_1_relation_span"), "required", "optional");
//      replaceClass (document.getElementById ("guest_1_relation"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_1_relation_span"), "required_missed", "optional");
    }
    if (( ! document.getElementById ("guest_1_travel").checked ) && ( document.getElementById ("guest_1_name").value != "" )){
      if ( document.getElementById ("guest_1_email").value == "" ){
        replaceClass (document.getElementById ("guest_1_email"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_1_email_span"), "required", "required_missed");
        missCnt++;
      }
      if ( document.getElementById ("guest_1_phone_cell").value == "" ){
        replaceClass (document.getElementById ("guest_1_phone_cell"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_1_phone_cell_span"), "required", "required_missed");
        missCnt++;
      }
    }

    document.getElementById ("guest_2_email").value = document.getElementById ("guest_2_email").value.trim ();
    document.getElementById ("guest_2_phone_cell").value = document.getElementById ("guest_2_phone_cell").value.trim ();
    document.getElementById ("guest_2_name").value = document.getElementById ("guest_2_name").value.trim ();
//    document.getElementById ("guest_2_relation").value = document.getElementById ("guest_2_relation").value.trim ();
    if (( document.getElementById ("guest_2_email").value != "" ) || ( document.getElementById ("guest_2_phone_cell").value != "" )){
      // If we have an email address or phone number for a guest, we have to have a name and relation as well
      replaceClass (document.getElementById ("guest_2_name"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_2_name_span"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_2_name"), "optional", "required_missed");
      replaceClass (document.getElementById ("guest_2_name_span"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_2_relation"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_2_relation_span"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_2_relation"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_2_relation_span"), "optional", "required_missed");
      missCnt++;
    }else{
      // Make sure to reset this special case back to "optional"
      replaceClass (document.getElementById ("guest_2_name"), "required", "optional");
      replaceClass (document.getElementById ("guest_2_name_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_2_name"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_2_name_span"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_2_relation"), "required", "optional");
//      replaceClass (document.getElementById ("guest_2_relation_span"), "required", "optional");
//      replaceClass (document.getElementById ("guest_2_relation"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_2_relation_span"), "required_missed", "optional");
    }
    if (( ! document.getElementById ("guest_2_travel").checked ) && ( document.getElementById ("guest_2_name").value != "" )){
      if ( document.getElementById ("guest_2_email").value == "" ){
        replaceClass (document.getElementById ("guest_2_email"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_2_email_span"), "required", "required_missed");
        missCnt++;
      }
      if ( document.getElementById ("guest_2_phone_cell").value == "" ){
        replaceClass (document.getElementById ("guest_2_phone_cell"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_2_phone_cell_span"), "required", "required_missed");
        missCnt++;
      }
    }

    document.getElementById ("guest_3_email").value = document.getElementById ("guest_3_email").value.trim ();
    document.getElementById ("guest_3_phone_cell").value = document.getElementById ("guest_3_phone_cell").value.trim ();
    document.getElementById ("guest_3_name").value = document.getElementById ("guest_3_name").value.trim ();
//    document.getElementById ("guest_3_relation").value = document.getElementById ("guest_3_relation").value.trim ();
    if (( document.getElementById ("guest_3_email").value != "" ) || ( document.getElementById ("guest_3_phone_cell").value != "" )){
      // If we have an email address or phone number for a guest, we have to have a name and relation as well
      replaceClass (document.getElementById ("guest_3_name"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_3_name_span"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_3_name"), "optional", "required_missed");
      replaceClass (document.getElementById ("guest_3_name_span"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_3_relation"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_3_relation_span"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_3_relation"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_3_relation_span"), "optional", "required_missed");
      missCnt++;
    }else{
      // Make sure to reset this special case back to "optional"
      replaceClass (document.getElementById ("guest_3_name"), "required", "optional");
      replaceClass (document.getElementById ("guest_3_name_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_3_name"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_3_name_span"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_3_relation"), "required", "optional");
//      replaceClass (document.getElementById ("guest_3_relation_span"), "required", "optional");
//      replaceClass (document.getElementById ("guest_3_relation"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_3_relation_span"), "required_missed", "optional");
    }
    if (( ! document.getElementById ("guest_3_travel").checked ) && ( document.getElementById ("guest_3_name").value != "" )){
      if ( document.getElementById ("guest_3_email").value == "" ){
        replaceClass (document.getElementById ("guest_3_email"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_3_email_span"), "required", "required_missed");
        missCnt++;
      }
      if ( document.getElementById ("guest_3_phone_cell").value == "" ){
        replaceClass (document.getElementById ("guest_3_phone_cell"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_3_phone_cell_span"), "required", "required_missed");
        missCnt++;
      }
    }

    document.getElementById ("guest_4_email").value = document.getElementById ("guest_4_email").value.trim ();
    document.getElementById ("guest_4_phone_cell").value = document.getElementById ("guest_4_phone_cell").value.trim ();
    document.getElementById ("guest_4_name").value = document.getElementById ("guest_4_name").value.trim ();
//    document.getElementById ("guest_4_relation").value = document.getElementById ("guest_4_relation").value.trim ();
    if (( document.getElementById ("guest_4_email").value != "" ) || ( document.getElementById ("guest_4_phone_cell").value != "" )){
      // If we have an email address or phone number for a guest, we have to have a name and relation as well
      replaceClass (document.getElementById ("guest_4_name"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_4_name_span"), "required", "required_missed");
      replaceClass (document.getElementById ("guest_4_name"), "optional", "required_missed");
      replaceClass (document.getElementById ("guest_4_name_span"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_4_relation"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_4_relation_span"), "required", "required_missed");
//      replaceClass (document.getElementById ("guest_4_relation"), "optional", "required_missed");
//      replaceClass (document.getElementById ("guest_4_relation_span"), "optional", "required_missed");
      missCnt++;
    }else{
      // Make sure to reset this special case back to "optional"
      replaceClass (document.getElementById ("guest_4_name"), "required", "optional");
      replaceClass (document.getElementById ("guest_4_name_span"), "required", "optional");
      replaceClass (document.getElementById ("guest_4_name"), "required_missed", "optional");
      replaceClass (document.getElementById ("guest_4_name_span"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_4_relation"), "required", "optional");
//      replaceClass (document.getElementById ("guest_4_relation_span"), "required", "optional");
//      replaceClass (document.getElementById ("guest_4_relation"), "required_missed", "optional");
//      replaceClass (document.getElementById ("guest_4_relation_span"), "required_missed", "optional");
    }
    if (( ! document.getElementById ("guest_4_travel").checked ) && ( document.getElementById ("guest_4_name").value != "" )){
      if ( document.getElementById ("guest_4_email").value == "" ){
        replaceClass (document.getElementById ("guest_4_email"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_4_email_span"), "required", "required_missed");
        missCnt++;
      }
      if ( document.getElementById ("guest_4_phone_cell").value == "" ){
        replaceClass (document.getElementById ("guest_4_phone_cell"), "required", "required_missed");
        replaceClass (document.getElementById ("guest_4_phone_cell_span"), "required", "required_missed");
        missCnt++;
      }
    }

  }

  if ( missCnt > 0 ){
    var msg = 'Some required fields were not specified.  Please fill out the missing required information (fields marked with red), and try submitting the form again.';
    
    if ( msgs.length > 0 ){
      msg += "\n\nSpecial Notes:";
      for ( var msgCnt = 0; msgCnt < msgs.length; msgCnt++ ){
        msg += "\n - " + msgs [msgCnt];
      }
    }
    
    alert (msg);
    
    return false;
  }
  
  if ( ! captchaVerified ){
    verifyCAPTCHA ();

    // Return false so that the form does not submit, and we can process the AJAX verification of the CAPTCHA and resubmit the form upon successful validation.
    return false;
  }

  // If everything validated, we need to re-enable any form controls that are disabled, so they will be submitted by the browser.
  reenableControls ();
  
  return true;
}

function verifyCAPTCHA (){
  var elChecking = document.getElementById ("captcha_check");
  var checkCAPTCHA = document.getElementById ("ct_captcha").value.trim ();

  document.getElementById ("ct_captcha").value = checkCAPTCHA;   // If we did need to trim it, put the trimmed text back in the box.

  elChecking.style.display = 'block';

  var url = "captcha_check.php?t=400&ct_captcha=" + checkCAPTCHA;
  makeRequest (url, processCAPTCHACheck);
}

function processCAPTCHACheck (xhr){
  if ( xhr.readyState == 4 ){
    if ( xhr.status == 200 ){
      var checkRetData = JSON.parse (xhr.responseText);

      document.getElementById ("captcha_check").style.display = 'none';

      if ( checkRetData ['error'] == '' ){
        captchaVerified = true;
        // Verified, so resubmit the form.
        document.getElementById ("form_submit").click ();
      }else{
        captchaVerified = false;
        replaceClass (document.getElementById ("ct_captcha"), "required", "required_missed");
        alert (checkRetData ['error']);
      }
    }else{
      alert ("There was a problem with the request " + xhr.status);
    }
  }
}

function initPage (){
  checkPreConferenceRoleRestrictions ();
  checkPreConference ();
  checkLodging ();
  checkEarlyExtraLodgingDays ();
  checkExtraLodgingDays ();
  checkSharing ();
  checkAirTransportation ();
  checkGroundTransportation ();
  checkGuest ();
  checkLabelEnables ();
  
  captchaVerified = false;
}