// Copyright (c) 2004-2006 koikikukan All Rights Reserved.

// http://www.koikikukan.com/

// License is granted if and only if this entire

// copyright notice is included. By Yujiro ARAKI.



// Ver1.00 2006.03.15 initial version.

// Ver1.01 2006.04.11 fix bug.

// Ver1.02 2006.04.15 fix bug.

// Ver1.03 2006.04.16 fix bug.

// Ver1.04 2006.08.03 fix bug.



var currentYear;

var currentMonth;

var currentDay;



function setCurrentDate() {

    data = new Date();

    currentYear = data.getYear();

    currentYear = (currentYear < 2000) ? currentYear + 1900 : currentYear;

    currentMonth = data.getMonth() + 1;

    currentDay = data.getDate();

}



function isToday(year, month, day) {

    if (year == currentYear && parseInt(month,10) == currentMonth && day == currentDay) {

        return true;

    }

    return false;

}



function isSaturday(year, month, day) {

    var week = new Date(year, month - 1, day).getDay();

    if (week == 6) {

        return true;

    }

    return false;

}



function isHoliday(year, month, day) {

    var week = new Date(year, month - 1, day).getDay();

    if (week == 0) {

        return true;

    }

    switch(parseInt(month,10)) {

    case 1:

        if (day == 1) {

            return true;

        }

        if (day == 2 && isSunday(year, month, 1)) {

            return true;

        }

        if (day == (getFirstMonday(year, month) + 7)) {

            return true;

        }

        break;

    case 2:

        if (day == 11) {

            return true;

        }

        if (day == 12 && isSunday(year, month, 11)) {

            return true;

        }

        break;

    case 3:

        if(year > 1979 && year < 2100) {

            if (day == parseInt(20.8431 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4))) {

                return true;

            }

        }

        break;

    case 4:

        if (day == 29) {

            return true;

        }

        if (day == 30 && isSunday(year, month, 29)) {

            return true;

        }

        break;

    case 5:

        if (day == 3 || day == 4 || day == 5) {

            return true;

        }

        if (day == 6 && (isSunday(year, month, 3) ||

                         isSunday(year, month, 4) ||

                         isSunday(year, month, 5))) {

            return true;

        }

        break;

    case 7:

        if (day == (getFirstMonday(year, month) + 14)) {

            return true;

        }

        break;

    case 9:

        if (day == (getFirstMonday(year, month) + 14)) {

            return true;

        }

        if(year > 1979 && year < 2100) {

            if (day == parseInt(23.2488 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4))) {

                return true;

            }

        }

        break;

    case 10:

        if (day == (getFirstMonday(year, month) + 7)) {

            return true;

        }

        break;

    case 11:

        if (day == 3 || day == 23) {

            return true;

        }

        if (day == 4 && isSunday(year, month, 3)) {

            return true;

        }

        if (day == 24 && isSunday(year, month, 23)) {

            return true;

        }

        break;

    case 12:

        if (day == 23) {

            return true;

        }

        if (day == 24 && isSunday(year, month, 23)) {

            return true;

        }

        break;

    }

    return false;

}



function isSunday(year, month, day) {

    var week = new Date(year, month - 1, day).getDay();

    if (week == 0) {

        return true;

    }

    return false;

}



function getFirstMonday(year, month) {

    var monday;

    for(monday = 1; monday < 8; monday++) {

        if(new Date(year, month - 1, monday).getDay() == 1) {

            break;

        }

    }

    return monday;

}