//////////////////////////////////////////
// JavaScript Document
// カレンダーjs
//////////////////////////////////////////
// CSSのクラス名指定
var classNames = new Array('holyday','xday','birthday');

// 休日設定
// holyday[ここに日にちを半角で] = X; Xにはクラスの配列番号を
var holyday = new Object();

// 日曜日は自動的に休み表示されます
// 下記の場合だと2010/1/1はclassNamesで指定されている0番目のクラスにするという意味
// 特に何もない場合は0でOK
holyday["2010/8/13"] = 0;
holyday["2010/8/14"] = 0;
holyday["2010/8/15"] = 0;
holyday["2010/9/20"] = 0;
holyday["2010/9/23"] = 0;
holyday["2010/10/11"] = 0;
holyday["2010/11/3"] = 0;
holyday["2010/11/23"] = 0;
holyday["2010/12/23"] = 0;
holyday["2010/12/28"] = 0;
holyday["2010/12/29"] = 0;
holyday["2010/12/30"] = 0;
holyday["2010/12/31"] = 0;
holyday["2011/1/1"] = 0;
holyday["2011/1/2"] = 0;
holyday["2011/1/3"] = 0;
holyday["2011/1/10"] = 0;
holyday["2011/4/29"] = 0;
holyday["2011/5/3"] = 0;
holyday["2011/5/4"] = 0;
holyday["2011/5/5"] = 0;
holyday["2011/7/18"] = 0;
holyday["2011/8/13"] = 0;
holyday["2011/8/15"] = 0;
holyday["2011/9/19"] = 0;
holyday["2011/9/23"] = 0;
holyday["2011/10/10"] = 0;
holyday["2011/11/3"] = 0;
holyday["2011/11/23"] = 0;
holyday["2011/12/23"] = 0;
holyday["2011/12/28"] = 0;
holyday["2011/12/29"] = 0;
holyday["2011/12/30"] = 0;
holyday["2011/12/31"] = 0;
holyday["2012/1/1"] = 0;
holyday["2012/1/2"] = 0;
holyday["2012/1/3"] = 0;
holyday["2012/1/9"] = 0;
holyday["2012/2/11"] = 0;
holyday["2012/3/20"] = 0;
holyday["2012/3/25"] = 0;
holyday["2012/3/31"] = 0;


var today = new Date();
var cal_year = today.getYear();
var cal_month = today.getMonth() + 1;
var cal_day = today.getDate();
if (cal_year < 1900) cal_year += 1900;
document.write("<div id='calendar'></div>");
var cal = document.getElementById("calendar");
var defaultBackgroundColors = new Object();
var to_year = cal_year;
var to_month = cal_month;
var to_day = cal_day;

function tdOver(obj){
	defaultBackgroundColors[obj] = obj.style.backgroundColor;
	obj.style.backgroundColor = '#E8EEF9';
}
function tdOut(obj){
	obj.style.backgroundColor = defaultBackgroundColors[obj];
}
function spanOver(obj){
	defaultBackgroundColors[obj] = obj.style.backgroundColor;
	obj.style.color = '#FF9900';
}
function spanOut(obj){
	obj.style.color = defaultBackgroundColors[obj];
}
function currentCal(){
	cal_year = to_year;
	cal_month = to_month;
	cal_day = to_day;
	writeCal(cal_year,cal_month,cal_day);
}
function prevCal(){
	cal_month -= 1;
	if(cal_month < 1){
		cal_month = 12;
		cal_year -= 1;
	}
	writeCal(cal_year,cal_month,0);
}
function nextCal(){
	cal_month += 1;
	if(cal_month > 12){
		cal_month = 1;
		cal_year += 1;
	}
	writeCal(cal_year,cal_month,0);
}
function getWeek(year,month,day){
	if (month == 1 || month == 2) {
		year--;
		month += 12;
	}
	var week = Math.floor(year + Math.floor(year/4) - Math.floor(year/100) +　Math.floor(year/400) + Math.floor((13 * month + 8) / 5) + day) % 7;
	return week;
}
function writeCal(year,month,day){
	var calendars = new Array(0,31,28,31,30,31,30,31,31,30,31,30,31);
	var weeks = new Array("日","月","火","水","木","金","土");
	var monthName = new Array('none','1月','2月','3月','4月','5月','6月','7月','8月','9月','10月','11月','12月');
	var cal_flag = 0;
	if(year % 100 == 0 || year % 4 != 0){
		if(year % 400 != 0){
			cal_flag = 0;
		}
		else{
			cal_flag = 1;
		}
	}
	else if(year % 4 == 0){
		cal_flag = 1;
	}
	else{
		cal_flag = 0;
	}
	calendars[2] += cal_flag;
	var cal_start_day = getWeek(year,month,1);
	var cal_tags = "<table border='0' cellspacing='0' cellpadding='0' class='calendar'>";
	cal_tags += "<tr><th colspan='7'>";
	cal_tags += monthName[month] + " / " + year + "年</th></tr>";
	cal_tags += "<tr class='headline'>";
	for(var i=0;i<weeks.length;i++){
		cal_tags += "<td>" + weeks[i] + "</td>";
	}
	cal_tags += "</tr><tr>";
	for(var i=0;i < cal_start_day;i++){
		cal_tags += "<td>&nbsp;</td>";
	}
	//main
	for(var cal_day_cnt = 1;cal_day_cnt <= calendars[month];cal_day_cnt++){
		var cal_day_match = year + "/" + month + "/" + cal_day_cnt;
		var dayClass = "";
		if(holyday[cal_day_match] != undefined){
			dayClass = ' class="'+classNames[holyday[cal_day_match]]+'"';
		}
		else if(cal_day_cnt == day){
			dayClass = ' class="Today"';
		}
		else if(cal_start_day == 0){
			dayClass = ' class="Sun"';
		}
		else if(cal_start_day == 6){
			dayClass = ' class="Sat"';
		}
		cal_tags += "<td onMouseOver='tdOver(this);' onMouseOut='tdOut(this);'"+dayClass+">" + cal_day_cnt + "</td>";
		if(cal_start_day == 6){
			cal_tags += "</tr>";
			if(cal_day_cnt < calendars[month]){
				cal_tags += "<tr>";
			}
			cal_start_day = 0;
		}
		else{
			cal_start_day++;
		}
	}
	while(cal_start_day <= 6 && cal_start_day != 0){
		cal_tags += "<td>&nbsp;</td>";
		if(cal_start_day == 6){
			cal_tags += "</tr>";
		}
		cal_start_day++;
	}
	cal_tags += "<tr><th colspan='7'>";
	cal_tags += "<span onMouseOver='spanOver(this);' onMouseOut='spanOut(this);' onClick='nextCal();'>[次月]&nbsp;</span>";
	cal_tags += "<span onMouseOver='spanOver(this);' onMouseOut='spanOut(this);' onClick='currentCal();'>[今月]&nbsp;</span>";
	cal_tags += "<span onMouseOver='spanOver(this);' onMouseOut='spanOut(this);' onClick='prevCal();'>[前月]</span></th></tr>";
	cal_tags += "</table>";
	cal.innerHTML = cal_tags;
}
writeCal(cal_year,cal_month,cal_day);