// Copyright (c) 2004-2007 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.
// Ver1.05 2007.04.21 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;
						}
						if (day == (parseInt(20.8431 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4)) + 1) && isSunday(year, month, day - 1)) {
								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;
						}
						if (day == (parseInt(23.2488 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4)) + 1) && isSunday(year, month, day - 1)) {
								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;
}