<!--
Date.prototype.toY4MDString = function(delim) {
	if (delim == undefined) delim = "";
	var year = this.getFullYear().toString();
	var month = this.getMonth() + 1;
	var day = this.getDate();
	month = (month < 10 ? "0" : "") + month;
	day = (day < 10 ? "0" : "") + day;
	return year + delim + month + delim + day;
}

var ruaSequence = [
	"-","-","-","-","O","-","-","O","-","O","O","-","O","O","O","-","-","-","-","-","-","-","O","-","O","-","-","O","-","-","-","O","-","-","-","O","-","-","O","-","-","-","O"
];
var pivotDate = null;
var weekdays = ["일","월","화","수","목","금","토"];
var ymdObj = null;
var weekdayObj = null;
var mgIdObjArray = new Array(40);

function incDate() { pivotDate.setHours(24); updatePage(pivotDate); return false; }
function decDate() { pivotDate.setHours(-24); updatePage(pivotDate); return false; }
function updatePage() {
	var absdays = Math.floor((pivotDate - 0) / (24 * 60 * 60 * 1000));
	var ruashift = (40 * absdays) % ruaSequence.length;
	var midnight = new Date(); midnight.setHours(0,0,0,0);
	var current = new Date();
	var isToday = (pivotDate - midnight == 0);

	if (isToday) {
		ymdObj.innerHTML = "<font color=blue>" + pivotDate.toY4MDString("-") + "</font>";
	} else {
		ymdObj.innerHTML = "<font color=gray>" + pivotDate.toY4MDString("-") + "</font>";
	}
	weekdayObj.innerHTML = weekdays[pivotDate.getDay()];

	var i, j;
	// 자정부터흐른시간을 이용하여 몇번째인지를 알아냄
	// 36분의 에린의 하루 및 이웨카 출몰이 에린기준 자정과의 차이가 현실시간 9분임을 고려
	var active = Math.floor((current - midnight - 540000) / 2160000);
	// 문게이트가 열린상태인지 닫힌상태인지 알아내는 로직
	var erinnTime = (current - midnight - 540000) % 2160000;
	var isMGOpen = (erinnTime > 1080000);
	for (i=0, j=ruashift; i<40; i++, j++) {
		if (j >= ruaSequence.length) j = 0;
		if (isToday && (active == i)) {
			if (isMGOpen) {
				mgIdObjArray[i].innerHTML = "<font color=blue><b>" + ruaSequence[j] + "</b></font>";
			} else {
				mgIdObjArray[i].innerHTML = "<font color=black><b>" + ruaSequence[j] + "</b></font>";
			}
		} else {
			mgIdObjArray[i].innerHTML = ruaSequence[j];
		}
	}
}

function initDoc() {
	ymdObj = document.getElementById("ymd");
	weekdayObj = document.getElementById("weekday");
	for (var i=0; i<mgIdObjArray.length; i++) {
		mgIdObjArray[i] = document.getElementById("mgId" + i);
	}
	pivotDate = new Date();
	pivotDate.setHours(0,0,0,0); // 금일 자정으로 설정
	updatePage();
}
-->
