//var $j = jQuery.noConflict();

function $get(id) {
    return document.getElementById(id);
}

function $value(id) {
    return document.getElementById(id).value;
}

var toggle = {
    show: function(id) {
        $get(id).style.display = '';
    },
    hide: function(id) {
        $get(id).style.display = 'none';
    }
}

function common_onload() {
    
    if ($get('OutDay')) {
        fillDayDropDownList($get('OutDay'), $get('OutMonthYear'), dayOfWeekNames, null);
        fillDayDropDownList($get('ReturnDay'), $get('ReturnMonthYear'), dayOfWeekNames, null);
    }

    if ($get('CheckInDay')) fillDayDropDownList($get('CheckInDay'), $get('CheckInMonthYear'), dayOfWeekNames, selectableDays);
    if ($get('CheckOutDay')) fillDayDropDownList($get('CheckOutDay'), $get('CheckOutMonthYear'), dayOfWeekNames, selectableDays);

    $j('#CheckInMonthYear').change(function() { monthYear_change(this, 'CheckInDay'); });
    $j('#CheckOutMonthYear').change(function() { monthYear_change(this, 'CheckOutDay'); });

    $j('#IsReturnLegRequired').change(function() { isReturnLegRequired_change(this, false); })
                            .each(function() { isReturnLegRequired_change(this, true); });

    $j('#RouteGroup').change(function() { routeGroup_change(this, false); })
                    .each(function() { routeGroup_change(this, true); });

    $j('#RouteGroupReturn').change(function() { routeGroupReturn_change(this); });

    $j('#OutMonthYear').change(function() { monthYear_change(this, 'OutDay'); updateSailingTimes(true); });
    $j('#ReturnMonthYear').change(function() { monthYear_change(this, 'ReturnDay'); updateSailingTimes(false); });

    $j('#OutDay').change(function() { updateSailingTimes(true); });
    $j('#ReturnDay').change(function() { updateSailingTimes(false); });

    $j('select#Vehicle').change(function() { vehicle_change(this); }).change();

    $j('#VehicleType').change(function() { vehicleType_change(this.value); }).change();

    $j('#TrailerType').change(function() { trailerType_change(this.value); }).change();

    $j("#showTrailerOptions").click(function() { showTrailerOptions(this.checked); });

    $j('#ChildAgeLink').click(function() { getChildAges(); return false; });

    $j('#NumChildren').change(function() { numChildren_change(this.value); return false; }).change();
}

// fills "dayDropDown" with 1 entry for each day in month given by "monthYearDropDown" selected value
// uses "dayOfWeekNames" localised day-of-week names
function fillDayDropDownList(dayDropDown, monthYearDropDown, dayOfWeekNames, selectableDays) {

    // if dropdowns not initialised, do nothing
    if (dayDropDown.selectedIndex == -1) return;

    var dateParts = monthYearDropDown.value.split('-');
    var year = dateParts[0];
    var month = dateParts[1] - 1;

    var startOfMonth = new Date(year, month, 1);
    var totalDays = numDaysInMonth(year, month);
    var dow = startOfMonth.getDay();

    // save current selected day
    var selectedDay = parseInt(dayDropDown.options[dayDropDown.selectedIndex].value, 10);

    var selectedFound = false;
    var dayDiff = 100;
    dayDropDown.options.length = 0;
    for (day = 1; day <= totalDays; day++) {

        // if there's a selectable days list, only do day if it's listed
        if (!selectableDays || contains(selectableDays, dow)) {
            dayDropDown.options.length += 1;
            dayDropDown.options[dayDropDown.length - 1] = new Option(day + ' ' + dayOfWeekNames[dow], day);

            // if previously added day had the smallest distance to the old selected day, 
            // make it the new selected day
            if (!selectedFound && Math.abs(day - selectedDay) > dayDiff) {
                dayDropDown.selectedIndex = dayDropDown.length - 2;   //option before current one
                selectedFound = true;
            }
            dayDiff = Math.abs(day - selectedDay);
        }
        dow = (dow < 6) ? dow + 1 : 0;
    }

    // if no selected item use last one
    if (!selectedFound) dayDropDown.selectedIndex = dayDropDown.length - 1;
}

// returns the number of days in the month requested month
function numDaysInMonth(year, month) {

    var m2 = parseInt(month, 10) + 1;
    var y2 = parseInt(year, 10);

    if (m2 > 11) {
        m2 = 0;
        y2 += 1;
    }

    var d1 = new Date(year, month, 1);
    var d2 = new Date(y2, m2, 1);

    return Math.round((d2 - d1) / (1000 * 60 * 60 * 24));
}

function routeGroup_change(caller, isInitialising) {
    if (redirectForRoute(caller.value)) return;

    setSailingTimes(caller.value, '#OutTime', true);

    var ret = $j('#RouteGroupReturn')[0];
    if (ret) {
        fillReturnRouteDropDown(isInitialising);
        setSailingTimes(ret.value, '#ReturnTime', false);
    }
    else {
        setSailingTimes(caller.value, '#ReturnTime', false);
    }
}

// post form if "redirect" route code
function redirectForRoute(routeName) {
    var redirectRoutes = ["LODRUkSpain", "LODRSpainUk"];

    if (contains(redirectRoutes, routeName)) {
        var result = confirm(searchMessages.lodrLandBridge);
        if (result == true) {
            $j("#SearchForm, #SearchAgainForm").submit();
            return true;
        }
    }
    return false;
}

function routeGroupReturn_change(caller) {
    setSailingTimes(caller.value, '#ReturnTime', false);
}

function setSailingTimes(routeName, timeId, isOutLeg) {

    var times = $j(timeId)[0];
    if (!times || !sailingTimes) return;

    var selectedTime = times.value;

    times.options.length = 0;

    var timelist = sailingTimes[routeName];

    // fixup times for POLE/LEPO summer 2011 sailings
    if (routeName == "LODRPortLeha" || routeName == "LODRLehaPort") {
        var dt = (isOutLeg)
                ? createDateFromFormControls("OutMonthYear", "OutDay")
                : createDateFromFormControls("ReturnMonthYear", "ReturnDay");
        if (dt >= new Date(2011, 4, 26) && dt <= new Date(2011, 8, 5)) {
            if (routeName == "LODRPortLeha") {
                timelist = ["08:30", "23:00"];
            }
            else {
                timelist = ["17:00", "14:15"];
            }
        }
    }

    if (timelist) {
        // use specific times for route
        for (var i in timelist) {
            times.options[i] = new Option(timelist[i], timelist[i].replace(':', ''));
        }
    }
    else {
        // use general (hourly) times
        var s;
        for (var i2 = 0; i2 < 24; i2++) {
            s = '0' + i2;
            s = s.substring(s.length - 2, s.length);
            times.options[i2] = new Option(s + ':00', s + '00');
        }
    }
    // restore selected time
    setNearestSelectedTime(times, selectedTime);
}

function setNearestSelectedTime(select, value) {
    var mins, diff;
    var smallestDiff = 24 * 60;
    var smallestDiffIndex = 0;

    var selectedMins = toMinutes(value);

    for (var i = 0; i < select.options.length; i++) {
        mins = toMinutes(select.options[i].value);
        diff = Math.abs(mins - selectedMins);
        if (diff < smallestDiff) {
            smallestDiff = diff;
            smallestDiffIndex = i;
        }
    }
    select.selectedIndex = smallestDiffIndex;
}

function toMinutes(time) {
    var hours = parseInt(time.substr(0, 2), 10);
    var mins = parseInt(time.substr(2, 2), 10);
    return hours * 60 + mins;
}

function isReturnLegRequired_change(sender, isInitialising) {
    var s = '#ReturnDay, #ReturnMonthYear, #ReturnTime, #RouteGroupReturn'
    if (sender.value == 'true') {
        $j(s).attr('disabled', '');
        if (!isInitialising) {
            fillReturnRouteDropDown(false);
            if ($get('RouteGroupReturn'))
                setSailingTimes($value('RouteGroupReturn'), '#ReturnTime');
            else
                setSailingTimes($value('RouteGroup'), '#ReturnTime');
        }
    }
    else $j(s).attr('disabled', 'disabled');
}

function monthYear_change(sender, dayDropDownName) {

    // restrict to selectable days if accom date
    var days = (dayDropDownName == 'CheckInDay' || dayDropDownName == 'CheckInDay') ? days = selectableDays : null;

    fillDayDropDownList($get(dayDropDownName), sender, dayOfWeekNames, days);
}

function updateSailingTimes(isOutLeg) {
    if (isOutLeg) {
        setSailingTimes($value("RouteGroup"), "#OutTime", isOutLeg);
    }
    else {
        var ret = $j("#RouteGroupReturn")[0];
        if (ret) {
            setSailingTimes(ret.value, "#ReturnTime", isOutLeg);
        }
    }
}

function vehicle_change(caller) {
    var trailer = $j('#Trailer')[0];
    if (!trailer) return;

    // disable trailer if disallowed for vehicle type
    var parts = caller.value.split('/');
    if (parts.length > 0) {
        var vehicle = parts[0];
        if (vehicle == 'CAR' || vehicle == 'CMP' || vehicle == 'MTC' || vehicle == 'MBS' || vehicle == 'VAN')
            trailer.disabled = false;
        else {
            trailer.selectedIndex = 0;
            trailer.disabled = true;
        }
    }
}

function vehicleType_change(vehicleType) {

    var dimensions = vehicleDimensions[vehicleType];
    if (!dimensions) {
        $j(".vehicleDimensions, #trailerSelect").hide();
        if ($j("#showTrailerOptions:checked").length) $j(".trailerOptions").hide();
        setVehicleOptions('VehicleHeight', [0]);
        setVehicleOptions('VehicleLength', [0]);
    }
    else {
        $j(".vehicleDimensions, #trailerSelect").show();
        if ($j("#showTrailerOptions:checked").length) $j(".trailerOptions").show();
        setVehicleOptions('VehicleLength', dimensions.lengths);
        setVehicleOptions('VehicleHeight', dimensions.heights);
    }
}

function trailerType_change(trailerType) {

    var dimensions = vehicleDimensions[trailerType];
    if (!dimensions) {
        $j(".trailerDimensions").hide();
        setVehicleOptions('TrailerLength', [0]);
        setVehicleOptions('TrailerHeight', [0]);
    }
    else {
        if ($j(".trailerOptions:visible").length) $j(".trailerDimensions").show();
        setVehicleOptions('TrailerLength', dimensions.lengths);
        setVehicleOptions('TrailerHeight', dimensions.heights);
    }
}

function setVehicleOptions(selectId, values) {
    var select = $get(selectId);
    var refercode = document.getElementById("ReferCode").value;
    var v;
    if (select && values) {
        selected = select.value;
        select.options.length = 0;
        var upto = searchMessages.upTo + " ";
        for (var i = 0; i < values.length;  i++) {
            v = values[i];
            if (v == 0) select.options[i] = new Option(0, 0);
            else if (refercode.substr(0, 3) == "FGT") select.options[i] =  new Option(upto + v / 100 + "m", v)
            else select.options[i] = new Option(upto + (v + 1) / 100 + "m", v);
            if (v == selected) select.selectedIndex = i;
        }
    }
}

function showTrailerOptions(enabled) {
    if (enabled) $j(".trailerOptions").show();
    else $j(".trailerOptions").hide();
}

function numAdults_onchange(self) {
    var maxChildren = $j("#childAgesGroup>div:not(.clear)").not(".unused").length;
    if (maxChildren == 0) maxChildren = 8;
    setMaxChildren(Math.min(8 - self.selectedIndex, maxChildren));

    numChildren_change($j("#NumChildren").val());
}

function setMaxChildren(maxChildren) {
    var children = $get('NumChildren');

    if (children) {
        var numChildren = children.selectedIndex;

        var i;
        children.options.length = 0;
        for (i = 0; i < maxChildren + 1; i++) {
            children.options[i] = new Option(i, i);
        }

        // restore selected index (within new range)
        children.selectedIndex = (numChildren > maxChildren) ? maxChildren : numChildren;
    }
}

function numChildren_change(numChildren) {
    $j("#childAgesGroup>div:not(.clear)")
        .hide()
        .filter(":lt(" + numChildren + ")")
        .show();
    if (numChildren==0) $j("#childAgeText").hide();
    else $j("#childAgeText").show();
}

function search_onsubmit(sender) {

    try {
        // vehicle from vehicle type
        $j("#VehicleType:visible").each(function() {
            var type = $j("#VehicleType").val() + "/";
            var len = $j("#VehicleLength").val() + "/";
            var height = $j("#VehicleHeight").val();
            $j("#Vehicle").val(type + len + height);

            $j("#showTrailerOptions:checked").each(function() {
                var type = $j("#TrailerType").val() + "/";
                var len = $j("#TrailerLength").val() + "/";
                var height = $j("#TrailerHeight").val();
                $j("#Trailer").val(type + len + height);
            });
        });
        
        // accom search
        if ($get('HotelLocation')) {

            if (!hasAccomSearchLocation()) return false;
            if (!doesHotelLocationUseValidCharacters()) return false;

            if (formHasUserRoomSelection()) {
                if (!doesHotelHaveRooms()) return false;
                if (!isHotelRoomCapacityCorrectForNumPax()) return false;
                if (!isAtLeastOneAdultPerHotelRoom()) return false;
            }

            // if there are hotel date controls in form ...
            if (($get('hotelDatesGroup') && $get('hotelDatesGroup').style.display != 'none') || $get('AccomSearchAgain')) {

                // validate hotel form date values
                var checkInDate = createDateFromFormControls('CheckInMonthYear', 'CheckInDay');
                if (!isCheckInDateInFuture(checkInDate, 1)) return false;

                // only test checkout date if exists (form might be using duration instead of checkout date)
                if ($get('CheckOutMonthYear')) {
                    var checkOutDate = createDateFromFormControls('CheckOutMonthYear', 'CheckOutDay');
                    if (!isCheckOutDateAfterCheckInDate(checkInDate, checkOutDate)) return false;
                }
            }
        }

        // ferry search
        if ($get('RouteGroup')) {

            // get sailing dates
            var outDate = createDateTimeFromFormControls('OutMonthYear', 'OutDay', 'OutTime');
            var returnDate = (isReturnLegSelected())
                                ? createDateTimeFromFormControls('ReturnMonthYear', 'ReturnDay', 'ReturnTime')
                                : null;

            // validate ferry form values
            if (!isRouteSelected()) return false;
            if (!isDepartDateFarEnoughAhead(outDate)) return false;
            if (!isReturnDateAfterDepartDate(outDate, returnDate)) return false;
            if (!doesFootPaxOnlyRouteHaveFootPaxSelected()) return false;
            if (!isAllowedVehTypeForRGAT_OEND()) return false;
            if (!isLODREnoughAdultsForPets()) return false;
            if (isLODRCHRO()) return false;
            if (isLODRPetsCHRO()) return false;
            if (isFootPaxRestricted()) return false
            if (!isDateAfterLDMTDate(outDate)) return false;
            if (isLDMTPets()) return false;
            if (isFootPaxLDMT()) return false;
            if (!isLODRSpecialOfferDateOK($value("ReferCode"), outDate)) return false;

            // user must confirm it's OK if sailing same day out & return
            if (isReturnOnSameDay()) { if (!isOKToReturnOnSameDay()) return false; }

            // vehicle rules/warnings
            var vehicle = $j('#Vehicle').val();
            var numPax = parseInt($j('#NumAdults').val(), 10) + parseInt($j('#NumChildren').val(), 10);
            if (!checkBicycleRules(vehicle, numPax)) return false;
            if (!checkMotorcycleRules(vehicle, numPax)) return false;
        }

        // child ages
        if (!areChildAgesValid()) return false;

        showLODRDocumentWarning()
        showGLDAPetKennelWarning()
        
        // disable hotel dates if they weren't visible to the user, so they don't get posted
        if ($get('HotelLocation')) {
            if ($get('accomCheckInRow') && $get('accomCheckInRow').style.display == 'none') {
                $get('CheckInDay').disabled = true;
                $get('CheckInMonthYear').disabled = true;
                if ($get('CheckOutDay')) {
                    $get('CheckOutDay').disabled = true;
                    $get('CheckOutMonthYear').disabled = true;
                }
                if ($get('AccomDuration')) $get('AccomDuration').disabled = true;
            }
        }
    }
    catch (e) {
        //ignore validation errors
    }

    // post form
    sender.action = 'results.aspx';
    sender.submit();
    return true;
}

function isRouteSelected() {
    var badRoute = $value('RouteGroup') == '' || $value('RouteGroup').substring(0, 1) == '*';
    if (!showAlertIf(badRoute, searchMessages.noRoute)) {
        $get('RouteGroup').focus();
        return false;
    }
    return true;
}

function isOKToReturnOnSameDay() {
    return confirm(searchMessages.isSameDayOK);
}

function isReturnOnSameDay() {
    return (isReturnLegSelected() &&
            $value('OutDay') == $value('ReturnDay') &&
            $value('OutMonthYear') == $value('ReturnMonthYear'));
}

function isDepartDateFarEnoughAhead(outDate) {
    var MIN_HOURS_BEFORE_SAILING = 0;
    var now = new Date();
    if (!showAlertIf(outDate < now.setHours(now.getHours() + MIN_HOURS_BEFORE_SAILING), searchMessages.departDateInPast)) {
        $get('OutDay').focus();
        return false;
    }
    return true;
}

function isReturnDateAfterDepartDate(outDate, returnDate) {
    if (returnDate == null) return true;

    var MIN_HOURS_BETWEEN_SAILINGS = 2;
    var dt = new Date(outDate.getTime());
    dt.setHours(dt.getHours() + MIN_HOURS_BETWEEN_SAILINGS);
    if (!showAlertIf(returnDate < dt, searchMessages.returnSailingAfterDepart.replace('<#>', MIN_HOURS_BETWEEN_SAILINGS))) {
        $get('ReturnDay').focus();
        return false;
    }
    return true;
}

function isCheckInDateInFuture(checkInDate, minDaysAhead) {
    var earliest = new Date();
    earliest.setDate(earliest.getDate() + minDaysAhead - 1);
    if (!showAlertIf(checkInDate < earliest, searchMessages.checkInDateInFuture.replace('<#>', earliest.toLocaleDateString()))) {
        $get('CheckInDay').focus();
        return false;
    }
    return true;
}

function isCheckOutDateAfterCheckInDate(checkInDate, checkOutDate) {
    if (!showAlertIf(checkInDate >= checkOutDate, searchMessages.checkOutDateAfterCheckInDate)) {
        $get('CheckOutDay').focus();
        return false;
    }
    return true;
}

function isHotelRoomCapacityCorrectForNumPax() {
    var numPax = parseInt($value('NumAdults'), 10) + parseInt($value('NumChildren'), 10) - getNumInfants();
    var roomPax = numPeopleForHotelRoom('RoomType1', 'NumRooms1') + numPeopleForHotelRoom('RoomType2', 'NumRooms2');

    if (!showAlertIf(numPax != roomPax, searchMessages.wrongRoomCapacityForPax.replace('<#1>', numPax).replace('<#2>', roomPax).replace('-newline-', '\n'))) {
        $get('RoomType1').focus();
        return false;
    }
    return true;
}

function isAtLeastOneAdultPerHotelRoom() {
    var numAdults = parseInt($value('NumAdults'), 10);
    var numRooms = numHotelRooms('RoomType1', 'NumRooms1') + numHotelRooms('RoomType2', 'NumRooms2');

    if (!showAlertIf(numAdults < numRooms, searchMessages.adultForEachRoom)) {
        $get('NumRooms1').focus();
        return false;
    }
    return true;
}

// returns number of infants (age 0 or 1) in child ages list
function getNumInfants() {
    var childAgeString = $value('ChildAges');
    if (childAgeString == '') return 0;

    var numInfants = 0;
    var childAges = childAgeString.split(',');

    for (var i in childAges) {
        if (childAges[i] == '0' || childAges[i] == '1') numInfants++;
    }

    return numInfants;
}

// returns person capacity of selected room type & quantity
function numPeopleForHotelRoom(selectRoomType, selectNumRooms) {
    var roomCapacity = hotelRoomCapacities[$value(selectRoomType)];
    if (roomCapacity == undefined) return 0;

    var personsPerRoom = parseInt(roomCapacity, 10);
    var numRooms = parseInt($value(selectNumRooms), 10);
    return personsPerRoom * numRooms;
}

// returns number of hotel rooms for specified room dropdowns
function numHotelRooms(selectRoomType, selectNumRooms) {
    if ($value(selectRoomType) == '') return 0;
    return parseInt($value(selectNumRooms), 10);
}

// set child age hidden tag & check that there is an age for each child
function areChildAgesValid() {

    var $childAges = $j("#childAgesGroup");

    // child age dropdowns version
    if ($childAges.length) {
        var result = true;
        
        $childAges.each(function() {

            var a = [];
            var numChildren = $j('#NumChildren').val();
            $j("#childAgesGroup select:lt(" + numChildren + ")").each(function(i) {
                var $age = $j(this);

                // check each child has an age
                if ($age.val() == "") {
                    alert(searchMessages.selectChildAges);
                    $age.focus();
                    result = false;
                    return false;
                }

                a.push($age.val());
            });

            $j("#ChildAges").val(a.join(","));
        })

        return result;
    }
    
    // child age link version
    var numChildren = parseInt($value('NumChildren'), 10);
    var childAgeString = $value('ChildAges');

    var childAges;
    var numAges;
    if (childAgeString == '') {
        childAges = [];
        numAges = 0;
    }
    else {
        childAges = childAgeString.split(',');
        numAges = childAges.length;
    }

    // trim child ages to numChildren (if larger)
    childAges = childAges.slice(0, numChildren);
    $get('ChildAges').value = childAges.join(',');

    // must be 1 age for every child
    if (numAges < numChildren) {
        alert(searchMessages.childAgeMessage);
        $get('NumChildren').focus();
        return false;
    };

    return true;
}

function doesFootPaxOnlyRouteHaveFootPaxSelected() {
    var route = $value('RouteGroup');

    var footPaxRoutes = ['LondonBourgSM', 'LondonMoutiers', 'AshfordBourgSM', 'AshfordMoutiers', 'UKAllSkiResorts', 'UKParis', 'UKDisney'];
    if (contains(footPaxRoutes, route)) {
        if ($value('Vehicle').substring(0, 3) != 'FOO') {

            alert(searchMessages.footPaxOnly);
            if ($get('Vehicle').tagName == 'SELECT') $get('Vehicle').focus()
            return false;
        }
    }
    return true;
}

function checkBicycleRules(vehicle, numPax) {

    if (vehicle.substr(0, 3) != 'BIC') return true;
    if ($j('#RouteGroup').val().substr(0, 4) != 'LODR') return true;

    if (numPax > 2) {
        alert(searchMessages.multipleBicycleError);
        return false;
    }
    if (numPax > 1) {
        return confirm(searchMessages.multipleBicycleWarn);
    }
    return true;
}

function checkMotorcycleRules(vehicle, numPax) {

    if (vehicle.substr(0, 3) != 'MTC') return true;

    if (numPax > 2 && $j('#RouteGroup').val().substr(0, 4) == 'LODR') {
        alert(searchMessages.multipleMotorcycleError);
        return false;
    }
    if (numPax > 1)
        return confirm(searchMessages.multipleMotorcycleWarn);

    return true;
}

function isAllowedVehTypeForRGAT_OEND() {

    var appliesToRoute = false;
    var route = $j("#RouteGroup").val();
    if (route == 'LODRRgatOend' || route == 'LODROendRgat') {
        appliesToRoute = true;
    }
    var route2 = $j('#RouteGroupReturn').val();
    if (route2 == 'LODRRgatOend' || route2 == 'LODROendRgat') {
        appliesToRoute = true;
    }

    if (!appliesToRoute) return true;

    var vehicle = $j('#Vehicle').val().substr(0, 3);
    var trailer = $j('#Trailer').val();
    if (trailer) trailer = trailer.substr(0, 3);

    if (vehicle == 'FOO') {
        alert(searchMessages.footPaxNotAllowedRamsgateOstende);
        return false;
    }
    if (vehicle == 'BIC') {
        alert(searchMessages.bicycleNotAllowedRamsgateOstende);
        return false;
    }

    return true;
}

function isFootPaxRestricted() {
    var show = false;

    if ($j('#Vehicle').val().substr(0, 3) != 'FOO') return false;

    var route = $j("#RouteGroup").val();
    if (route == 'LODRDoveBoul' || route == 'LODRBoulDove') show = true;
    if (route == 'LODRGijoStna' || route == 'LODRStnaGijo') show = true;

    var route2 = $j('#RouteGroupReturn').val();
    if (route2 == 'LODRDoveBoul' || route2 == 'LODRBoulDove') show = true;
    if (route2 == 'LODRGijoStna' || route2 == 'LODRStnaGijo') show = true;

    if (show) {
        alert(searchMessages.lodrDoboFootPax);
        return true;
    }
    return false;
}

function isFootPaxLDMT() {
    var show = false;

    var veh = $j('#Vehicle').val().substr(0, 3);
    if (veh != 'FOO' && veh != 'BIC') return false;

    var route = $j("#RouteGroup").val();
    if (route == 'LDMTMarsTuni' || route == 'LDMTTuniMars') show = true;

    var route2 = $j('#RouteGroupReturn').val();
    if (route2 == 'LDMTMarsTuni' || route2 == 'LDMTTuniMars') show = true;

    if (show) {
        alert(searchMessages.noFootPaxLDMT);
        return true;
    }
    return false;
}

function isLODRSpecialOfferDateOK(referCode, sailingDate) {
    if (referCode == "FSLDG1") {
        alert("This special offer has expired, please return to the homepage");
        return false;
    }
    if (referCode == "FSLDE1") {
        alert("Cette offre spéciale est expirée, merci de retourner à la page d'accueil");
        return false;
    }
    return true;
}

function showLODRDocumentWarning() {

    var routeStart = $value('RouteGroup').substring(0, 4);
    if (routeStart != "LODR" && routeStart != "LDMT") return;
    
    alert(searchMessages.lodrChildWarning);
}

function showGLDAPetKennelWarning() {

    var routeStart = $value('RouteGroup');
    if (!((routeStart == "LODRGijoStna") || (routeStart == "LODRStnaGijo"))) return;
    var petNum = $j("#NumPets").val();
    if (petNum <= 0) return;
    alert(searchMessages.gldaPetsKennelWarning);
}

function isDateAfterLDMTDate(sailingDate) {
    var route = $value('RouteGroup');
    if (!sailingDate) return true;
    if (route != 'LDMTMarsTuni' && route != 'LDMTTuniMars') return true;

    return showAlertIf(sailingDate < new Date(2011, 10, 15), searchMessages.startDateLDMT);
}

function isLDMTPets() {
    var isrestricted;
    try {
        if ($get("NumPets") == null) return false;    // no pets prompt - exit
        var numpets = parseInt($value("NumPets"), 10);
        if (isNaN(numpets)) return false;   // no numeric pets field - exit
        if (numpets < 1) return false;      // no pets selected - exit

        isrestricted = false;
        var route = $value('RouteGroup');

        // check out route
        if (route == "LDMTMarsTuni") isrestricted = true;
        if (route == "LDMTTuniMars") isrestricted = true;

        if ($get('RouteGroupReturn') != null) {
            if (isReturnLegSelected()) {
                var route2 = $value('RouteGroupReturn');

                // check return route
                if (route2 == "LDMTMarsTuni") isrestricted = true;
                if (route2 == "LDMTTuniMars") isrestricted = true;
            }
        }
        if (isrestricted) {
            alert(searchMessages.noPetsLDMT);
            return true;
        }

        return false;
    }
    catch (e) {
        // ignore any errors
        return false;
    }
}

function isLODREnoughAdultsForPets() {
    var route = $value('RouteGroup');

    // only applies to lodr routegroups
    if (route.substring(0, 4) != "LODR") return true;

    if ($get("NumPets") == null) return true;
    var numPets = parseInt($value("NumPets"), 10);
    var numAdults = parseInt($value("NumAdults"), 10);

    // show message if more than 5 perts per adult
    return showAlertIf(numPets / numAdults > 5, searchMessages.max5PetsPerAdult);
}

function isLODRCHRO() {
    var route = $value('RouteGroup');
    var route2 = null;

    if ($get('RouteGroupReturn') != null) route2 = $value('RouteGroupReturn');

    if (route == "LODRRossCher" || route == "LODRCherRoss" ||
        route2 == "LODRRossCher" || route2 == "LODRCherRoss") {

        alert(searchMessages.sailingNotAvailable);
        return true;
    }
}

function isLODRPetsCHRO() {
    var isrestricted;
    try {
        if ($get("NumPets") == null) return false;    // no pets prompt - exit
        var numpets = parseInt($value("NumPets"), 10);
        if (isNaN(numpets)) return false;   // no numeric pets field - exit
        if (numpets < 1) return false;      // no pets selected - exit

        isrestricted = false;
        var route = $value('RouteGroup');

        // check out route
        if (route == "LODRRossCher") isrestricted = true;
        if (route == "LODRCherRoss") isrestricted = true;

        if ($get('RouteGroupReturn') != null) {
            var route2 = $value('RouteGroupReturn');

            // check return route
            if (route2 == "LODRRossCher") isrestricted = true;
            if (route2 == "LODRCherRoss") isrestricted = true;
        }
        // show alert if unavailable sailing time selected
        if (isrestricted) {
            alert(searchMessages.noPetsForLodrCHRO);
            return true;
        }

        return false;
    }
    catch (e) {
        // ignore any errors
        return false;
    }
}

function doesHotelHaveRooms() {

    if ($value('HotelLocation') != '') {
        if ($value('RoomType1') == '' || $value('NumRooms1') == '0') {
            alert(searchMessages.hotelButNoRooms);
            $get('RoomType1').focus();
            return false;
        }
        if ($value('RoomType2') != '' && $value('NumRooms2') == '0') {
            alert(searchMessages.hotelButNoRooms);
            $get('NumRooms2').focus();
            return false;
        }
    }
    return true;
}

function formHasUserRoomSelection() {
    // true if there is a 'RoomType1' element which is a dropdown
    return ($get('RoomType1') && $get('RoomType1').tagName == 'SELECT');
}

function hasAccomSearchLocation() {
    if (!showAlertIf(($value('HotelLocation') == ''), searchMessages.noAccomSearchLocation)) {
        $get('HotelLocation').focus();
        return false;
    }
    return true;
}

function doesHotelLocationUseValidCharacters() {
    //var rgx = /^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890ÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ÷\s\-,&']+$/;
    var rgx = /^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890ÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ÷\s\-,_&\(\)\.\@\*\~\|\+\=\-\#\']+$/;

    var isMatch = rgx.test($value('HotelLocation'));
    if (!showAlertIf(!isMatch, searchMessages.hotelCharacters)) {
        $get('HotelLocation').focus();
        return false;
    }
    return true;
}

// returns Date object for form values
function createDateFromFormControls(monthYearControl, dayControl) {
    var yearMonth = $value(monthYearControl).split('-');
    var year = yearMonth[0];
    var month = parseInt(yearMonth[1], 10) - 1;
    var day = $value(dayControl);

    return new Date(year, month, day);
}

// returns Date object (with time) for form values
function createDateTimeFromFormControls(monthYearControl, dayControl, timeControl) {
    var yearMonth = $value(monthYearControl).split('-');
    var year = yearMonth[0];
    var month = parseInt(yearMonth[1], 10) - 1;
    var day = $value(dayControl);
    var time = $value(timeControl);
    var hours = time.substring(0, 2);
    var mins = time.substring(2, 4);

    return new Date(year, month, day, hours, mins);
}

function isReturnLegSelected() {
    return ($j('#IsReturnLegRequired').val() == 'true');
}

// if condition true, shows alert & returns false
function showAlertIf(condition, message) {
    if (condition) {
        alert(message);
        return false;
    }
    return true;
}

// call child-ages popup
function getChildAges() {
    var numChildren = $value('NumChildren');
    if (numChildren == 0) alert(searchMessages.noChildrenSpecified);
    else window.open('child-ages.aspx?count=' + numChildren + '&language=' + languageCode + '&theme=' + theme, 'ChildAges', 'toolbars=no,scrollbars=no,location=no,statusbars=no,menubars=no,resizable=0,width=325,height=400');
}

function AltCityTownLink_onclick(sender) {
    $get('HotelLocation').value = sender.innerHTML;
    search_onsubmit($get('SearchAgainForm'));
}

function AltAccomLink_onclick(searchText) {
    $get('HotelLocation').value = searchText;
    search_onsubmit($get('SearchAgainForm'));
}

// returns true if array contains value
function contains(arr, value) {
    if (!arr) return false;
    for (var i in arr) if (arr[i] == value) return true;
    return false;
}

// fill return routes dropdown based on outbound route
function fillReturnRouteDropDown(isInitialising) {

    if (!isReturnLegSelected()) return;

    var route1in = $get('RouteGroupReturn');
    if (!route1in) return;

    var route1 = $get('RouteGroup');
    var routes = routeCombinations[route1.value];

    var savedValue = route1in.value;

    // copy '(select route)' initial option
    route1in.options.length = 0
    route1in.options[0] = new Option(route1.options[0].innerHTML, route1.options[0].value);

    // nothing selected, just copy first option (not a route)
    if (route1.value == '') return;

    // if no return routes list. copy all out routes to return routes list
    if (!routes) {
        var j = 1;
        for (i = 1; i < route1.options.length; i++) {
            var option = route1.options[i];
            route1in.options[j++] = new Option(option.innerHTML, option.value);
        }
    }
    else {
        // copy routes that are valid return routes
        for (i = 0; i < routes.length; i++) {
            var name = routes[i];

            var text = null;
            for (j = 0; j < route1.options.length; j++) {
                if (route1.options[j].value == name) {
                    text = route1.options[j].innerHTML;
                    break;
                }
            }
            if (text) {
                route1in.options[i + 1] = new Option(text, name);
            }
        }
    }

    // set return-route selected item to reverse of outbound-route
    var ports = route1.options[route1.selectedIndex].innerHTML.split(' - ');
    var reverseRoute = ports[1] + ' - ' + ports[0];
    var index = innerHTMLInCollection(reverseRoute, route1in);
    if (index) route1in.selectedIndex = index;

    // if initialising, and there was a saved index, and it's still there, restore it
    if (isInitialising && savedValue != '') {
        var i2 = valueInCollection(savedValue, route1in.options);
        if (i2) route1in.selectedIndex = i2;
    }
}

// returns index of "item" in array "a", or -1 if not found
function arrayIndex(a, item) {
    for (var i = 0; i < a.length; i++) if (a[i] == item) return i;
    return -1;
}

// returns index of _string_to_find_ in _source_collection_.innerHTML,
// or null if not found
function innerHTMLInCollection(string_to_find, source_collection) {
    for (i = 0; i < source_collection.length; i++) {
        if (source_collection[i].innerHTML == string_to_find) return i;
    }
    return null;
}

// returns index of _string_to_find_ in _source_collection_,
// or null if not found
function valueInCollection(string_to_find, source_collection) {
    for (i = 0; i < source_collection.length; i++) {
        if (source_collection[i].value == string_to_find) return i;
    }
    return null;
}