// Field        | Full Form          | Short Form
// -------------+--------------------+-----------------------
// Year         | yyyy (4 digits)    | yy (2 digits), y (2 or 4 digits)
// Month        | MMM (name or abbr.)| MM (2 digits), M (1 or 2 digits)
//              | NNN (abbr.)        |
// Day of Month | dd (2 digits)      | d (1 or 2 digits)
// Day of Week  | EE (name)          | E (abbr)
// Hour (1-12)  | hh (2 digits)      | h (1 or 2 digits)
// Hour (0-23)  | HH (2 digits)      | H (1 or 2 digits)
// Hour (0-11)  | KK (2 digits)      | K (1 or 2 digits)
// Hour (1-24)  | kk (2 digits)      | k (1 or 2 digits)
// Minute       | mm (2 digits)      | m (1 or 2 digits)
// Second       | ss (2 digits)      | s (1 or 2 digits)
// AM/PM        | a                  |
//
// NOTE THE DIFFERENCE BETWEEN MM and mm! Month=MM, not mm!
// Examples:
//  "MMM d, y" matches: January 01, 2000
//                      Dec 1, 1900
//                      Nov 20, 00
//  "M/d/yy"   matches: 01/20/00
//                      9/2/00
//  "MMM dd, yyyy hh:mm:ssa" matches: "January 01, 2000 12:30:45AM"
// ------------------------------------------------------------------

var MONTH_NAMES = new Array('January','February','March','April','May','June','July','August','September','October','November','December','1¿ù','2¿ù','3¿ù','4¿ù','5¿ù','6¿ù','7¿ù','8¿ù','9¿ù','10¿ù','11¿ù','12¿ù');
var DAY_NAMES = new Array('ÀÏ¿äÀÏ','¿ù¿äÀÏ','È­¿äÀÏ','¼ö¿äÀÏ','¸ñ¿äÀÏ','±Ý¿äÀÏ','Åä¿äÀÏ','ÀÏ','¿ù','È­','¼ö','¸ñ','±Ý','Åä');
//var MONTH_NAMES = new Array('January','February','March','April','May','June','July','August','September','October','November','December','Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
//var DAY_NAMES = new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');
function LZ(x) {return(x<0||x>9?"":"0")+x}

// ------------------------------------------------------------------
// isDate ( date_string, format_string )
// Returns true if date string matches format of format string and
// is a valid date. Else returns false.
// It is recommended that you trim whitespace around the value before
// passing it to this function, as whitespace is NOT ignored!
// ------------------------------------------------------------------
function isDate(val,format) {
	var date=getDateFromFormat(val,format);
	if (date==0) { return false; }
	return true;
}

// -------------------------------------------------------------------
// compareDates(date1,date1format,date2,date2format)
//   Compare two date strings to see which is greater.
//   Returns:
//   1 if date1 is greater than date2
//   0 if date2 is greater than date1 of if they are the same
//  -1 if either of the dates is in an invalid format
// -------------------------------------------------------------------
function compareDates(date1,dateformat1,date2,dateformat2) {
	var d1=getDateFromFormat(date1,dateformat1);
	var d2=getDateFromFormat(date2,dateformat2);
	if (d1==0 || d2==0) {
		return -1;
	} else if (d1 > d2) {
		return 1;
	}
	return 0;
}

// ------------------------------------------------------------------
// formatDate (date_object, format)
// Returns a date in the output format specified.
// The format string uses the same abbreviations as in getDateFromFormat()
// ------------------------------------------------------------------
function formatDate(date,format) {
	date = typeof(date) == 'string' ? parseDate(date) : date;
	forat=format+"";
	var result="";
	var i_format=0;
	var c="";
	var token="";
	var y=date.getYear()+"";
	var M=date.getMonth()+1;
	var d=date.getDate();
	var E=date.getDay();
	var H=date.getHours();
	var m=date.getMinutes();
	var s=date.getSeconds();
	var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,H,KK,K,kk,k;
	// Convert real date parts into formatted versions
	var value=new Object();
	if (y.length < 4) {y=""+(y-0+1900);}
	value["y"]=""+y;
	value["yyyy"]=y;
	value["yy"]=y.substring(2,4);
	value["M"]=M;
	value["MM"]=LZ(M);
	value["MMM"]=MONTH_NAMES[M-1];
	value["NNN"]=MONTH_NAMES[M+11];
	value["d"]=d;
	value["dd"]=LZ(d);
	value["E"]=DAY_NAMES[E+7];
	value["EE"]=DAY_NAMES[E];
	value["H"]=H;
	value["HH"]=LZ(H);
	if (H==0){value["h"]=12;}
	else if (H>12){value["h"]=H-12;}
	else {value["h"]=H;}
	value["hh"]=LZ(value["h"]);
	if (H>11){value["K"]=H-12;} else {value["K"]=H;}
	value["k"]=H+1;
	value["KK"]=LZ(value["K"]);
	value["kk"]=LZ(value["k"]);
	if (H > 11) { value["a"]="PM"; }
	else { value["a"]="AM"; }
	value["m"]=m;
	value["mm"]=LZ(m);
	value["s"]=s;
	value["ss"]=LZ(s);
	while (i_format < format.length) {
		c=format.charAt(i_format);
		token="";
		while ((format.charAt(i_format)==c) && (i_format < format.length)) {
			token += format.charAt(i_format++);
		}
		if (value[token] != null) { result=result + value[token]; }
		else { result=result + token; }
	}
	return result;
}
	
// ------------------------------------------------------------------
// Utility functions for parsing in getDateFromFormat()
// ------------------------------------------------------------------
function _isInteger(val) {
	var digits="1234567890";
	for (var i=0; i < val.length; i++) {
		if (digits.indexOf(val.charAt(i))==-1) { return false; }
	}
	return true;
}
function _getInt(str,i,minlength,maxlength) {
	for (var x=maxlength; x>=minlength; x--) {
		var token=str.substring(i,i+x);
		if (token.length < minlength) { return null; }
		if (_isInteger(token)) { return token; }
	}
	return null;
}
	
// ------------------------------------------------------------------
// getDateFromFormat( date_string , format_string )
//
// This function takes a date string and a format string. It matches
// If the date string matches the format string, it returns the 
// getTime() of the date. If it does not match, it returns 0.
// ------------------------------------------------------------------
function getDateFromFormat(val,format) {
	val=val+"";
	format=format+"";
	var i_val=0;
	var i_format=0;
	var c="";
	var token="";
	var token2="";
	var x,y;
	var now=new Date();
	var year=now.getYear();
	var month=now.getMonth()+1;
	var date=1;
	var hh=now.getHours();
	var mm=now.getMinutes();
	var ss=now.getSeconds();
	var ampm="";
	
	while (i_format < format.length) {
		// Get next token from format string
		c=format.charAt(i_format);
		token="";
		while ((format.charAt(i_format)==c) && (i_format < format.length)) {
			token += format.charAt(i_format++);
		}
		// Extract contents of value based on format token
		if (token=="yyyy" || token=="yy" || token=="y") {
			if (token=="yyyy") { x=4;y=4; }
			if (token=="yy")   { x=2;y=2; }
			if (token=="y")    { x=2;y=4; }
			year=_getInt(val,i_val,x,y);
			if (year==null) { return 0; }
			i_val += year.length;
			if (year.length==2) {
				if (year > 70) { year=1900+(year-0); }
				else { year=2000+(year-0); }
				}
			}
		else if (token=="MMM"||token=="NNN"){
			month=0;
			for (var i=0; i<MONTH_NAMES.length; i++) {
				var month_name=MONTH_NAMES[i];
				if (val.substring(i_val,i_val+month_name.length).toLowerCase()==month_name.toLowerCase()) {
					if (token=="MMM"||(token=="NNN"&&i>11)) {
						month=i+1;
						if (month>12) { month -= 12; }
						i_val += month_name.length;
						break;
						}
					}
				}
			if ((month < 1)||(month>12)){return 0;}
		}
		else if (token=="EE"||token=="E"){
			for (var i=0; i<DAY_NAMES.length; i++) {
				var day_name=DAY_NAMES[i];
				if (val.substring(i_val,i_val+day_name.length).toLowerCase()==day_name.toLowerCase()) {
					i_val += day_name.length;
					break;
					}
				}
		}
		else if (token=="MM"||token=="M") {
			month=_getInt(val,i_val,token.length,2);
			if(month==null||(month<1)||(month>12)){return 0;}
			i_val+=month.length;}
		else if (token=="dd"||token=="d") {
			date=_getInt(val,i_val,token.length,2);
			if(date==null||(date<1)||(date>31)){return 0;}
			i_val+=date.length;}
		else if (token=="hh"||token=="h") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<1)||(hh>12)){return 0;}
			i_val+=hh.length;}
		else if (token=="HH"||token=="H") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<0)||(hh>23)){return 0;}
			i_val+=hh.length;}
		else if (token=="KK"||token=="K") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<0)||(hh>11)){return 0;}
			i_val+=hh.length;}
		else if (token=="kk"||token=="k") {
			hh=_getInt(val,i_val,token.length,2);
			if(hh==null||(hh<1)||(hh>24)){return 0;}
			i_val+=hh.length;hh--;}
		else if (token=="mm"||token=="m") {
			mm=_getInt(val,i_val,token.length,2);
			if(mm==null||(mm<0)||(mm>59)){return 0;}
			i_val+=mm.length;}
		else if (token=="ss"||token=="s") {
			ss=_getInt(val,i_val,token.length,2);
			if(ss==null||(ss<0)||(ss>59)){return 0;}
			i_val+=ss.length;}
		else if (token=="a") {
			if (val.substring(i_val,i_val+2).toLowerCase()=="am") {ampm="AM";}
			else if (val.substring(i_val,i_val+2).toLowerCase()=="pm") {ampm="PM";}
			else {return 0;}
			i_val+=2;}
		else {
			if (val.substring(i_val,i_val+token.length)!=token) {return 0;}
			else {i_val+=token.length;}
		}
	}
	// If there are any trailing characters left in the value, it doesn't match
	if (i_val != val.length) { return 0; }
	// Is date valid for month?
	if (month==2) {
		// Check for leap year
		if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
			if (date > 29){ return 0; }
		}
		else { if (date > 28) { return 0; } }
	}
	if ((month==4)||(month==6)||(month==9)||(month==11)) {
		if (date > 30) { return 0; }
	}
	// Correct hours value
	if (hh<12 && ampm=="PM") { hh=hh-0+12; }
	else if (hh>11 && ampm=="AM") { hh-=12; }
	var newdate=new Date(year,month-1,date,hh,mm,ss);
	return newdate.getTime();
}

// ------------------------------------------------------------------
// parseDate( date_string [, prefer_euro_format] )
//
// This function takes a date string and tries to match it to a
// number of possible date formats to get the value. It will try to
// match against the following international formats, in this order:
// y-M-d   MMM d, y   MMM d,y   y-MMM-d   d-MMM-y  MMM d
// M/d/y   M-d-y      M.d.y     MMM-d     M/d      M-d
// d/M/y   d-M-y      d.M.y     d-MMM     d/M      d-M
// A second argument may be passed to instruct the method to search
// for formats like d/M/y (european format) before M/d/y (American).
// Returns a Date object or null if no patterns match.
// ------------------------------------------------------------------
function parseDate(val) {
	var preferEuro=(arguments.length==2)?arguments[1]:false;
	generalFormats=new Array('y-M-d','MMM d, y','MMM d,y','y-MMM-d','d-MMM-y','MMM d');
	monthFirst=new Array('M/d/y','M-d-y','M.d.y','MMM-d','M/d','M-d');
	dateFirst =new Array('d/M/y','d-M-y','d.M.y','d-MMM','d/M','d-M');
	var checkList=new Array('generalFormats',preferEuro?'dateFirst':'monthFirst',preferEuro?'monthFirst':'dateFirst');
	var d=null;
	for (var i=0; i<checkList.length; i++) {
		var l=window[checkList[i]];
		for (var j=0; j<l.length; j++) {
			d=getDateFromFormat(val,l[j]);
			if (d!=0) { return new Date(d); }
		}
	}
	return null;
}

function addYear(dateStr, amount) {
	var dateObj = parseDate(dateStr);
	var intYear = parseInt(formatDate(dateObj, "yyyy")) + amount;
	var intMonth = formatDate(dateObj, "MM");
	var intDay = formatDate(dateObj, "dd");
	
	return formatDate(parseDate(intYear+"-"+intMonth+"-"+intDay), "yyyy-MM-dd");
}

/*function addMonth(dateStr, amount) {
	var dateObj = parseDate(dateStr);
	var intYear = parseInt(formatDate(dateObj, "yyyy"));
	var intMonth = parseInt(formatDate(dateObj, "M")) + amount;
	var intDay = parseInt(formatDate(dateObj, "dd"));
	
	if (intMonth > 12) {
		intMonth = intMonth - 12;
		intYear = intYear + 1;
	}
	
	return formatDate(parseDate(intYear+"-"+intMonth+"-"+intDay), "yyyy-MM-dd");
}*/

function addMonth(dateStr, amount) {
    var yy, mm, dd;	 
    var dateStrArr = dateStr.split("-");
    var TDate  = new Date();
    TDate.setYear(dateStrArr[0]);
    TDate.setMonth(eval(dateStrArr[1]) - 1 + eval(amount) + "");
    TDate.setDate(dateStrArr[2]);
    yy = TDate.getYear() + "";
    mm = TDate.getMonth() + 1 + "";
    dd = TDate.getDate() + "";
    if(mm.length < 2) mm = "0" + mm;
    if(dd.length < 2) dd = "0" + dd;
    return yy + "-" + mm + "-" + dd;
}

function addDay(ymd, amount) {
	ymdArr = ymd.split("-");
	var yyyy = ymdArr[0];
	var mm = eval(ymdArr[1] + "- 1") ;
	var dd = ymdArr[2];
	var dt3 = new Date(yyyy, mm, eval(dd + '+' + amount));

	yyyy = dt3.getYear();
	mm = (dt3.getMonth()+1)<10? "0" + (dt3.getMonth()+1) : (dt3.getMonth()+1) ;
	dd = dt3.getDate()<10 ? "0" + dt3.getDate() : dt3.getDate();

	return formatDate(parseDate(yyyy+"-"+mm+"-"+dd), "yyyy-MM-dd");
}

/*-------------------------------------------------------------------------
 * µÎ ³¯Â¥°£ Â÷À̸¦ ±¸ÇÑ´Ù.
 * @return µÎ ³¯Â¥°£ °£°ÝÀ» ÀÏ ´ÜÀ§·Î ¹ÝȯÇÑ´Ù.
 -------------------------------------------------------------------------*/
function dayDiff(date1, date2) {
	var dateObj1 = parseDate(date1);
	var dateObj2 = parseDate(date2);
	
	return (dateObj2.getTime() - dateObj1.getTime()) / (1000 * 60 * 60 * 24);
}

/*-------------------------------------------------------------------------
 * µÎ ³¯Â¥°£ Àϼö Â÷À̸¦ ±¸ÇÑ´Ù.
 -------------------------------------------------------------------------*/
function gabDay(date1, date2)  {
	var days = Math.floor(dayDiff(date1, date2));

    return (days * -1);
}


/**
 * Time ½ºÆ®¸µÀ» ÀÚ¹Ù½ºÅ©¸³Æ® Date °´Ã¼·Î º¯È¯
 * parameter time: Time Çü½ÄÀÇ String
 */
function toTimeObject(time) { //parseTime(time)
    var year  = time.substr(0,4);
    var month = time.substr(4,2) - 1; // 1¿ù=0,12¿ù=11
    var day   = time.substr(6,2);
    var hour  = time.substr(8,2);
    var min   = time.substr(10,2);

    return new Date(year,month,day,hour,min);
}

/**
 * µÎ TimeÀÌ ¸î ½Ã°£ Â÷À̳ª´ÂÁö ±¸ÇÔ

 * time1ÀÌ time2º¸´Ù Å©¸é(¹Ì·¡¸é) minus(-)
 */
function getHourInterval(time1,time2) {
    var date1 = toTimeObject(time1);
    var date2 = toTimeObject(time2);
    var hour  = 1000 * 3600; //1½Ã°£

    return parseInt((date2 - date1) / hour, 10);
}