String.prototype.toDate			= toDate;
Date.prototype.getDateFormat	= getDateFormat;
Date.prototype.getAddDate		= getAddDate;
Date.prototype.getDayOfWeek		= getDayOfWeek;
Date.prototype.getMonthDay		= getMonthDay;
Date.prototype.isLeapYear		= isLeapYear;


function isNull(str){
	return ((str == null || str == "" || str == "undefined") ? true:false);
}


function toDate(pPattern)
{
	var index = -1;
	var year;
	var month;
	var day;
	var hour = 0;
	var min  = 0;
	var sec  = 0;
	var ms   = 0;

	if(isNull(pPattern)) pPattern = "YYYYMMDD"; 

	if ((index = pPattern.indexOf("YYYY")) == -1 ) {
		index = pPattern.indexOf("YY");
		year = "20" + this.substr(index, 2);
	} else {
		year = this.substr(index, 4);
	}

	index = pPattern.indexOf("MM");
	month = this.substr(index, 2);

	index = pPattern.indexOf("DD");
	day = this.substr(index, 2);

	if ((index = pPattern.indexOf("hh")) != -1 ) {
		hour = this.substr(index, 2);
	}

	if ((index = pPattern.indexOf("mm")) != -1 ) {
		min = this.substr(index, 2);
	}

	if ((index = pPattern.indexOf("ss")) != -1 ) {
		sec = this.substr(index, 2);
	}

	if ((index = pPattern.indexOf("SS")) != -1 ) {
		ms = this.substr(index, 2);
	}

	return new Date(year, month - 1, day, hour, min, sec, ms);
}


function getDateFormat(pPattern)
{
	var GLB_MONTH_IN_YEAR = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
	var GLB_DAY_IN_WEEK   = new Array("Sunday", "Monday", "Tuesday", "Wednesday","Thursday", "Friday", "Saturday");

    var year      = this.getFullYear();
    var month     = this.getMonth() + 1;
    var day       = this.getDate();
    var dayInWeek = this.getDay();
    var hour24    = this.getHours();
    var ampm      = (hour24 < 12) ? 0 : 1;
    var hour12    = (hour24 > 12) ? (hour24 - 12) : hour24;
    var min       = this.getMinutes();
    var sec       = this.getSeconds();
    var YYYY = "" + year;
    var YY   = YYYY.substr(2);
    var MM   = (("" + month).length == 1) ? "0" + month : "" + month;
    var MON  = GLB_MONTH_IN_YEAR[month-1];
    var DD   = (("" + day).length == 1) ? "0" + day : "" + day;
    var DAY  = GLB_DAY_IN_WEEK[dayInWeek];
    var HH   = (("" + hour12).length == 1) ? "0" + hour12 : "" + hour12;
    var hh   = (("" + hour24).length == 1) ? "0" + hour24 : "" + hour24;
    var mm   = (("" + min).length == 1) ? "0" + min : "" + min;
    var ss   = (("" + sec).length == 1) ? "0" + sec : "" + sec;
    var SS   = "" + this.getMilliseconds();
    var a    = (a == 0) ? "AM" : "PM";

    var dateStr;
    var index = -1;

    if (typeof(pPattern) == "undefined") {
    	dateStr = "YYYYMMDD";
    } else {
    	dateStr = pPattern;
    }

	dateStr = dateStr.replace(/a/g,    a);
	dateStr = dateStr.replace(/YYYY/g, YYYY);
	dateStr = dateStr.replace(/YY/g,   YY);
	dateStr = dateStr.replace(/MM/g,   MM);
	dateStr = dateStr.replace(/MON/g,  MON);
	dateStr = dateStr.replace(/DD/g,   DD);
	dateStr = dateStr.replace(/DAY/g,  DAY);
	dateStr = dateStr.replace(/hh/g,   hh);
	dateStr = dateStr.replace(/HH/g,   HH);
	dateStr = dateStr.replace(/mm/g,   mm);
	dateStr = dateStr.replace(/ss/g,   ss);
	dateStr = dateStr.replace(/SS/g,   SS);
	
	return dateStr;
}


function getAddDate(pNum, pKind)
{
	var rtnDate = this;

	if(isNull(pKind)) pKind = "D";

	switch(pKind){
		case "Y" : rtnDate.setFullYear(this.getFullYear() + pNum);break;
		case "M" : rtnDate.setMonth(this.getMonth() + pNum);break;
	    case "D" : rtnDate.setDate(this.getDate() + pNum);break;
		case "h" : rtnDate.setHours(this.getHours() + pNum);break;
		case "m" : rtnDate.setMinutes(this.getMinutes() + pNum);break;
		case "s" : rtnDate.setSeconds(this.getSeconds() + pNum);break;
    }

    return rtnDate;
}


function getDayOfWeek(pKind)
{
	if(pKind.toUpperCase() == "K") {
		var week = new Array("��","��","ȭ","��","��","��","��");
		return week[this.getDay()];
	} else if(pKind.toUpperCase() == "C") {
		var week = new Array("��","��","��","�","��","��","��");
		return week[this.getDay()];
	} else if(pKind.toUpperCase() == "E") {
		var week = new Array("Sun","Mon","Tue","Wed","Thu","Fri","Sat");
		return week[this.getDay()];
	} else if(pKind.toUpperCase() == "N") {
		return this.getDay() + "";
	}

	return "";
}


function getMonthDay()
{
	var year = this.getFullYear();
	var month = this.getMonth();


	with(new Date(year, month + 1, 1, 12)) {  
		setDate(0);
		return getDate();
	}
}


function isLeapYear()
{
	var yyyy = this.getFullYear();

	return (new Date(yyyy, 1, 29)).getMonth() == 1
}


function isLeapYear(year) {
	var yyyy = parseInt(year);
	
	return (new Date(yyyy, 1, 29)).getMonth() == 1
}


function getDateTime( pDate, pMode ){
	var rtnStr = null;

	sFDate = pDate.getFullYear();
	sFDate = sFDate.toString() + (( pDate.getMonth() + 1 > 9 ) ? pDate.getMonth() + 1 : "0" + (pDate.getMonth() + 1));
	sFDate = sFDate.toString() + (( pDate.getDate()      > 9 ) ? pDate.getDate() : "0" + pDate.getDate());

	sFTime = (( pDate.getHours() > 9 ) ? pDate.getHours() : "0" + pDate.getHours());
	sFTime = sFTime.toString() + (( pDate.getMinutes() > 9 ) ? pDate.getMinutes() : "0" + pDate.getMinutes());

	sFSec  = (( pDate.getSeconds() > 9 ) ? pDate.getSeconds() : "0" + pDate.getSeconds() );
	var x = new Array("��", "��", "ȭ", "��", "��", "��", "��");
	sWeek  = x[pDate.getDay()];

	switch( pMode.toUpperCase() ){
		case 'D': 
			rtnStr = sFDate;
			break;
		case 'T': 
			rtnStr = sFTime;
			break;
		case 'S': 
			rtnStr = sFTime + sFSec;
			break;
		case 'A': 
			rtnStr = sFDate + sFTime + sFSec;
			break;
		case 'W': 
			rtnStr = sWeek;
			break;

		default:  
			rtnStr = sFDate + sFTime;
	}
	return rtnStr;
}


function isValidDateTime(pDateString, pFormat)
{
	var dt = pDateString.toDate(pFormat).getDateFormat(pFormat);

	return (pDateString == dt);
}


function getRemoveFormatter(pDateString)
{
	if(pDateString.length == 10) {
		var arrDate = new Array(3);

		arrDate = pDateString.split("/");
		if(arrDate.length != 3) {
			arrDate = pDateString.split("-");
		}
		return arrDate[0] + arrDate[1] + arrDate[2];
	} else {
		return pDateString;
	}
}


function isValidMonth(pMonth)
{
	var month = 0;

	try {
		month = eval(pMonth);
	} catch(err) {
		return false;
	}

	return (month >= 1 && month <= 12);
}


function isValidDay(pDay)
{
	var day = 0;

	try {
		day = eval(pDay);
	} catch(err) {
		return false;
	}

	return (day >= 1 && day <= 31);
}


function getDateInterval(fromDate, endDate, format)
{
	var arrFromDate = new Array(3);
	var arrEndDate = new Array(3);

	if(fromDate.length == 8) {
		arrFromDate[0] = fromDate.substr(0, 4);
		arrFromDate[1] = fromDate.substr(4, 2);
		arrFromDate[2] = fromDate.substr(6, 2);
	} else if(fromDate.length == 10) {
		arrFromDate = fromDate.split("/");
		if(arrFromDate.length != 3) {
			arrFromDate = fromDate.split("-");
		}
	}

	if(endDate.length == 8) {
		arrEndDate[0] = endDate.substr(0, 4);
		arrEndDate[1] = endDate.substr(4, 2);
		arrEndDate[2] = endDate.substr(6, 2);
	} else if(endDate.length == 10) {
		arrEndDate = endDate.split("/");
		if(arrEndDate.length != 3) {
			arrEndDate = endDate.split("-");
		}
	}

	var rstFromDate = new Date(eval(arrFromDate[0]), eval(arrFromDate[1])-1, eval(arrFromDate[2]));
	var rstEndDate = new Date(eval(arrEndDate[0]), eval(arrEndDate[1])-1, eval(arrEndDate[2]));
	var rstFrom = rstFromDate.getTime();
	var rstEnd = rstEndDate.getTime();
	
	var daydue = Math.ceil((rstEnd - rstFrom) / (24 * 60 * 60 * 1000));
	var yeardue = 0;
	var monthdue = 0;

	
	if (format == null || format == "" || format.toLowerCase() == "dd") {
		return daydue;
	} else {
		format = format.toLowerCase();
	}
	
	var year = arrFromDate[0];
	var month = arrFromDate[1];
	var day = arrFromDate[2];
	
	var dayCount = 0;
	
	
	if (day != 1) {
		month += 1;
	}
	
	do {
		if (month > 12) {
			month = 1;
			year += 1;
		}
		
		dayCount = getDayCountForMonth(year, month);
		
		if (daydue < dayCount) {
			break;
		}
		
		daydue = daydue - dayCount;
		month++;
		monthdue++;
		
		if (format == "yyyy" && daydue < 365 && (monthdue % 12) == 0) {
			break;
		}
		
	} while (true);
	
	
	if (format != "mmdd" && format != "mm" && monthdue >= 12) {
		yeardue = monthdue / 12;
		monthdue = monthdue % 12;
	}
	
	var result = "";
	if (format == "yyyy") {
		result = yeardue;
	} else if (format == "mm") {
		result = monthdue;
	} else if (format == "mmdd") {
		result = monthdue + "/" + daydue;
	} else if (format == "yyyymm") {
		result = yeardue + "/" + monthdue;
	} else if (format == "yyyymmdd") {
		result = yeardue + "/" + monthdue + "/" + daydue;
	}
	
	return result;
}


function getDayCountForMonth(year, month) {
	var normal = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
	var leap = new Array(32, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

	if (isLeapYear(year)) {
		return leap[month - 1];
	} else {
		return normal[month - 1];
	}
}


function getTimeInterval(fromTime, endTime)
{
	var arrFromTime = new Array(3);
	var arrEndTime = new Array(3);

	if(fromTime.length == 4 || fromTime.length == 6) {
		arrFromTime[0] = fromTime.substr(0, 2);
		arrFromTime[1] = fromTime.substr(2, 2);
		arrFromTime[2] = fromTime.substr(4, 2);
	} else if(fromTime.length == 5 || fromTime.length == 8) {
		arrFromTime = fromTime.split(":");
	}
	if(arrFromTime[2].length == 0) arrFromTime[2] = 0;

	if(endTime.length == 4 || endTime.length == 6) {
		arrEndTime[0] = endTime.substr(0, 2);
		arrEndTime[1] = endTime.substr(2, 2);
		arrEndTime[2] = endTime.substr(4, 2);
	} else if(endTime.length == 5 || endTime.length == 8) {
		arrEndTime = endTime.split(":");
	}
	if(arrEndTime[2].length == 0) arrEndTime[2] = 0;

	var rstFromTime = new Date(2000, 1, 1, eval(arrFromTime[0]), eval(arrFromTime[1]), eval(arrFromTime[2]), 0);
	var rstEndTime = new Date(2000, 1, 1, eval(arrEndTime[0]), eval(arrEndTime[1]), eval(arrEndTime[2]), 0);
	var diffTime = (rstEndTime - rstFromTime) / 1000;

	return diffTime;
}


function getNewDate(){
		var rtnDate = new Date();
		var timediff = getGlobalVariable("timediff");
		var serverInterval = 0;

		if(!isNull(timediff) && !isNaN(timediff)){
			serverInterval = parseInt(timediff);			
		}

		rtnDate.setTime(rtnDate.getTime() + serverInterval);
		
		return rtnDate;
}


function getCurrentDateTime(){
	return getCurrentDate() + " " + getCurrentTime();
}


function getCurrentDate()
{
	    var sDate = getNewDate();

		rtnDate = sDate.getFullYear();
		rtnDate = rtnDate.toString() + (( sDate.getMonth() + 1 > 9 ) ? sDate.getMonth() + 1 : "0" + (sDate.getMonth() + 1));
		rtnDate = rtnDate.toString() + (( sDate.getDate()      > 9 ) ? sDate.getDate() : "0" + sDate.getDate()) ;

		return rtnDate;
}


function getCurrentTime()
{
	    var sDate = getNewDate();

		rtnTime = (( sDate.getHours() > 9 ) ? sDate.getHours() : "0" + sDate.getHours());
		rtnTime = rtnTime.toString() + (( sDate.getMinutes() > 9 ) ? sDate.getMinutes() : "0" + sDate.getMinutes());
        rtnTime = rtnTime.toString() + (( sDate.getSeconds() > 9 ) ? sDate.getSeconds() : "0" + sDate.getSeconds());
		
		return rtnTime;
}


function getCurrentWeek(flag)
{
	    var sDate = getNewDate();

		sWeek = new Array("��", "��", "ȭ", "��", "��", "��", "��");

		rtnWeek = (flag == "K") ? sWeek[sDate.getDay()] : sDate.getDay();

		return rtnWeek;
}


function getStrDate(strDate) {
    var strDate = strDate;
    
    var strYear = "";
    var strMonth = "";
    var strDay = "";
    var strHour = "";
    var strMin = "";
    var strSec = "";
    
    if (strDate.length < 14) {
        
        
        alert("�����ʹ� 14�ڸ� �̻��̾�� �մϴ�.");
        
        return null;
    }
    
    strYear = strDate.substr(0, 4);
    strMonth = strDate.substr(4, 2);
    strDay = strDate.substr(6, 2);
    strHour = strDate.substr(8, 2);
    strMin = strDate.substr(10, 2);
    strSec = strDate.substr(12, 2);
    
    strDate = strYear + "-";
    strDate += strMonth + "-";
    strDate += strDay + " ";
    strDate += strHour + ":";
    strDate += strMin + ":";
    strDate += strSec;
    
    return strDate;
}