//DOB control IDs
var dobDateDayControlID = "#ctl00_ContentPlaceHolder1_DOBDateDay";
var dobDateMonthControlID = "#ctl00_ContentPlaceHolder1_DOBDateMonth";
var dobDateYearControlID = "#ctl00_ContentPlaceHolder1_DOBDateYear";

//Start date control IDs
var startDateDayControlID = "#ctl00_ContentPlaceHolder1_StartDateDay";
var startDateMonthControlID = "#ctl00_ContentPlaceHolder1_StartDateMonth";
var startDateYearControlID = "#ctl00_ContentPlaceHolder1_StartDateYear";

$(document).ready(function()
{
    //init DOB date picker
    var today = new Date();
    var tomorrow = new Date(today.getFullYear(), today.getMonth(), today.getDate()-0+1);
    var maximumDOB = new Date(today.getFullYear(), today.getMonth(), today.getDate()-0-56);
    var minimumDOB = new Date(today.getFullYear()-0-9, today.getMonth(), today.getDate()-0+1);
    var maximumStartDate = new Date(today.getFullYear(), today.getMonth()-0+2, today.getDate()-0-1);
    
    $("#linkedDOBDates").datepicker({
        firstDay: 1,
        minDate: minimumDOB, 
        maxDate: maximumDOB, 
        beforeShow: readLinkedDOB, 
        onSelect: updateLinkedDOB, 
        showOn: "both", 
        buttonImage: "/system_images/calendar.gif", 
        buttonImageOnly: true 
    });
    
    $("#linkedStartDates").datepicker({
        firstDay: 1,
        minDate: new Date(), 
        maxDate: maximumStartDate, 
        beforeShow: readLinkedStart, 
        onSelect: updateLinkedStart, 
        showOn: "both", 
        buttonImage: "/system_images/calendar.gif", 
        buttonImageOnly: true 
    });
    
    $(dobDateMonthControlID+","+dobDateYearControlID).change(checkLinkedDaysDOB); 
    $(startDateMonthControlID+","+startDateYearControlID).change(checkLinkedDaysStart); 
});

function readLinked(daySelect, monthSelect, yearSelect, datePicker)
{
    datePicker.val(mapMonthName(monthSelect.val()) + "/" + daySelect.val() + "/" + yearSelect.val());
    
    return {};
}

function updateLinked(date, daySelect, monthSelect, yearSelect)
{
    monthSelect.val(mapMonthInt(date.substring(0, 2))); 
    daySelect.val(date.substring(3, 5)); 
    yearSelect.val(date.substring(6, 10));
}

// Prevent selection of invalid dates through the select controls 
function checkLinkedDays(daySelect, monthSelect, yearSelect)
{ 
    var daysInMonth = 33 - new Date(yearSelect.val(), 
        mapMonthName(monthSelect.val()) - 1, 32).getDate();
         
    daySelect.attr("disabled", ""); 
    
    $("#" + daySelect.attr("id") + " option:gt(" + (daysInMonth - 1) +")").attr("disabled", "disabled"); 
    
    if (daySelect.val() > daysInMonth)
    { 
        daySelect.val(daysInMonth); 
    } 
}   

// Prepare to show a date picker linked to three select controls 
function readLinkedDOB()
{
    readLinked($(dobDateDayControlID), $(dobDateMonthControlID), $(dobDateYearControlID), $(this.id));
    return {}; 
} 

// Update three select controls to match a date picker selection 
function updateLinkedDOB(date)
{
    updateLinked(date, $(dobDateDayControlID), $(dobDateMonthControlID), $(dobDateYearControlID));
    return {};
} 

function checkLinkedDaysDOB()
{
    checkLinkedDays($(dobDateDayControlID), $(dobDateMonthControlID), $(dobDateYearControlID));
    return {};
}

//Start Date date picker methods
function checkLinkedDaysStart()
{
    checkLinkedDays($(startDateDayControlID), $(startDateMonthControlID), $(startDateYearControlID));
    return {};
}

// Prepare to show a date picker linked to three select controls 
function readLinkedStart()
{
    readLinked($(startDateDayControlID), $(startDateMonthControlID), $(startDateYearControlID), $(this.id));
    return {}; 
} 

// Update three select controls to match a date picker selection 
function updateLinkedStart(date)
{
    updateLinked(date, $(startDateDayControlID), $(startDateMonthControlID), $(startDateYearControlID));
    return {};
} 

function mapMonthInt(monthInt)
{
    monthNames = new Array(
        "January",
        "February",
        "March",
        "April",
        "May",
        "June",
        "July",
        "August",
        "September",
        "October",
        "November",
        "December");
        
    return monthNames[monthInt - 1];
}

function mapMonthName(monthName)
{
    var monthInt;
    switch(monthName.toLowerCase())
    {
        case "january":
            monthInt = 1;
            break;
        case "february":
            monthInt = 2;
            break;
        case "march":
            monthInt = 3;
            break;
        case "april":
            monthInt = 4;
            break;
        case "may":
            monthInt = 5;
            break;
        case "june":
            monthInt = 6;
            break;
        case "july":
            monthInt = 7;
            break;
        case "august":
            monthInt = 8;
            break;
        case "september":
            monthInt = 9;
            break;
        case "october":
            monthInt = 10;
            break;
        case "november":
            monthInt = 11;
            break;
        case "december":
            monthInt = 12;
            break;
    }
    return monthInt;
}