var weekend = [0,6];
var weekendColor = "#EFEFF8";
var fontface = "Tahoma";
var fontsize = "10pt";

var gNow = new Date();
var ggWinCal;
var version;
isNav = (navigator.appName.indexOf("Netscape") != -1) ? true : false;
isIE = (navigator.appName.indexOf("Microsoft") != -1) ? true : false;

Calendar.Months = ["January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"];
Calendar.Months_c = ["一月", "二月", "三月", "四月",
"五月", "六月", "七月", "八月", "九月",
"十月", "十一月", "十二月"];

// Non-Leap year Month days..
Calendar.DOMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
// Leap year Month days..
Calendar.lDOMonth = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];

function Calendar(p_item, p_WinCal, p_month, p_year, p_format) {
	if ((p_month == null) && (p_year == null))	return;

	if (p_WinCal == null)
		this.gWinCal = ggWinCal;
	else
		this.gWinCal = p_WinCal;

	if (p_month == null) {
		this.gMonthName = null;
		this.gMonth = null;
		this.gYearly = true;
	} else {
		this.gMonthName = Calendar.get_month(p_month);
		this.gMonth = new Number(p_month);
		this.gYearly = false;
	}

	this.gYear = p_year;
	this.gFormat = p_format;
	this.gBGColor = "white";
	this.gFGColor = "black";
	this.gTextColor = "black";
	this.gHeaderColor = "black";
	this.gReturnItem = p_item;
}

Calendar.get_month = Calendar_get_month;
Calendar.get_daysofmonth = Calendar_get_daysofmonth;
Calendar.calc_month_year = Calendar_calc_month_year;
Calendar.print = Calendar_print;

function Calendar_get_month(monthNo) {
	if(version=="e")
		return Calendar.Months[monthNo];
	else
		return Calendar.Months_c[monthNo];
}

function Calendar_get_daysofmonth(monthNo, p_year) {
	/*
	Check for leap year ..
	1.Years evenly divisible by four are normally leap years, except for...
	2.Years also evenly divisible by 100 are not leap years, except for...
	3.Years also evenly divisible by 400 are leap years.
	*/
	if ((p_year % 4) == 0) {
		if ((p_year % 100) == 0 && (p_year % 400) != 0)
			return Calendar.DOMonth[monthNo];

		return Calendar.lDOMonth[monthNo];
	} else
		return Calendar.DOMonth[monthNo];
}

function Calendar_calc_month_year(p_Month, p_Year, incr) {
	/*
	Will return an 1-D array with 1st element being the calculated month
	and second being the calculated year
	after applying the month increment/decrement as specified by 'incr' parameter.
	'incr' will normally have 1/-1 to navigate thru the months.
	*/
	var ret_arr = new Array();

	if (incr == -1) {
		// B A C K W A R D
		if (p_Month == 0) {
			ret_arr[0] = 11;
			ret_arr[1] = parseInt(p_Year) - 1;
		}
		else {
			ret_arr[0] = parseInt(p_Month) - 1;
			ret_arr[1] = parseInt(p_Year);
		}
	} else if (incr == 1) {
		// F O R W A R D
		if (p_Month == 11) {
			ret_arr[0] = 0;
			ret_arr[1] = parseInt(p_Year) + 1;
		}
		else {
			ret_arr[0] = parseInt(p_Month) + 1;
			ret_arr[1] = parseInt(p_Year);
		}
	}

	return ret_arr;
}

function Calendar_print() {
	ggWinCal.print();
}

function Calendar_calc_month_year(p_Month, p_Year, incr) {
	/*
	Will return an 1-D array with 1st element being the calculated month
	and second being the calculated year
	after applying the month increment/decrement as specified by 'incr' parameter.
	'incr' will normally have 1/-1 to navigate thru the months.
	*/
	var ret_arr = new Array();

	if (incr == -1) {
		// B A C K W A R D
		if (p_Month == 0) {
			ret_arr[0] = 11;
			ret_arr[1] = parseInt(p_Year) - 1;
		}
		else {
			ret_arr[0] = parseInt(p_Month) - 1;
			ret_arr[1] = parseInt(p_Year);
		}
	} else if (incr == 1) {
		// F O R W A R D
		if (p_Month == 11) {
			ret_arr[0] = 0;
			ret_arr[1] = parseInt(p_Year) + 1;
		}
		else {
			ret_arr[0] = parseInt(p_Month) + 1;
			ret_arr[1] = parseInt(p_Year);
		}
	}

	return ret_arr;
}

// This is for compatibility with Navigator 3, we have to create and discard one object before the prototype object exists.
new Calendar();

Calendar.prototype.getMonthlyCalendarCode = function() {
	var vCode = "";
	var vHeader_Code = "";
	var vData_Code = "";

	// Begin Table Drawing code here..
	vCode = vCode + "<center><TABLE BORDER=0 BGCOLOR=\"#EFEFF8\" cellspacing=0 cellpadding=5>";

	vHeader_Code = this.cal_header();
	vData_Code = this.cal_data();
	vCode = vCode + vHeader_Code + vData_Code;

	vCode = vCode + "</TABLE></center>";

	return vCode;
}

Calendar.prototype.show = function() {
	var vCode = "";

	this.gWinCal.document.open();

	// Setup the page...
	this.wwrite("<html>");
	this.wwrite("<head><title>Calendar</title>");
	this.wwrite("</head>");

	this.wwrite("<body " +
		"link=\"" + this.gLinkColor + "\" " +
		"vlink=\"" + this.gLinkColor + "\" " +
		"alink=\"" + this.gLinkColor + "\" " +
		"text=\"" + this.gTextColor + "\">");
	this.wwriteA("<center><table border=0><tr>")
	this.wwrite("<TD width=15% ALIGN=center><A HREF=\"" +
		"javascript:window.opener.Build(" +
		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)-1) + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='../images/arrow_left.gif' border=0><\/A></TD>");


	this.wwriteA("<td width=75% align=center>");
	this.wwriteA("<FONT FACE='" + fontface + "' SIZE=3 color=\"#000066\"><B> "+this.gYear+" </B>");

	this.wwriteA("</td>");
	this.wwrite("<TD width=15% ALIGN=center><A HREF=\"" +
		"javascript:window.opener.Build(" +
		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)+1) + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='../images/arrow_right.gif' border=0><\/A></TD>");
	this.wwriteA("</tr>");

	// Show navigation buttons
	var prevMMYYYY = Calendar.calc_month_year(this.gMonth, this.gYear, -1);
	var prevMM = prevMMYYYY[0];
	var prevYYYY = prevMMYYYY[1];

	var nextMMYYYY = Calendar.calc_month_year(this.gMonth, this.gYear, 1);
	var nextMM = nextMMYYYY[0];
	var nextYYYY = nextMMYYYY[1];

	this.wwrite("<TR>");
	this.wwrite("<TD ALIGN=center><A HREF=\"" +
		"javascript:window.opener.Build(" +
		"'" + this.gReturnItem + "', '" + prevMM + "', '" + prevYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='../images/arrow_left.gif' border=0><\/A></TD>");
	this.wwrite("<td align=center><FONT FACE='" + fontface + "' SIZE=3 color=\"#000066\"><B> ");
	this.wwrite(this.gMonthName);
	this.wwrite(" </B></td>");
	this.wwrite("<TD ALIGN=center><A HREF=\"" +
		"javascript:window.opener.Build(" +
		"'" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='../images/arrow_right.gif' border=0><\/A></TD>");
	this.wwrite("</TR></TABLE></center>");

	// Get the complete calendar code for the month..
	vCode = this.getMonthlyCalendarCode();
	this.wwrite(vCode);

	this.wwrite("</font></body></html>");
	this.gWinCal.document.close();
}

Calendar.prototype.wwrite = function(wtext) {
	this.gWinCal.document.writeln(wtext);
}

Calendar.prototype.wwriteA = function(wtext) {
	this.gWinCal.document.write(wtext);
}

Calendar.prototype.cal_header = function() {
	var vCode = "";
	if(version=="e"){
		vCode = vCode + "<TR>";
		vCode = vCode + "<TD align=center  WIDTH='14%' style='font-size:10px; font-family:Verdana, Arial, Helvetica, sans-serif; color:#FF0000'><B>Sun</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10px; font-family:Verdana, Arial, Helvetica, sans-serif; color:#666666'><B>Mon</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10px; font-family:Verdana, Arial, Helvetica, sans-serif; color:#666666'><B>Tue</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10px; font-family:Verdana, Arial, Helvetica, sans-serif; color:#666666'><B>Wed</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10px; font-family:Verdana, Arial, Helvetica, sans-serif; color:#666666'><B>Thu</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10px; font-family:Verdana, Arial, Helvetica, sans-serif; color:#666666'><B>Fri</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='16%' style='font-size:10px; font-family:Verdana, Arial, Helvetica, sans-serif; color:#009900'><B>Sat</B></FONT></TD>";
		vCode = vCode + "</TR>";
	}else{
		vCode = vCode + "<TR>";
		vCode = vCode + "<TD align=center  WIDTH='14%' style='font-size:10pt; font-family:"+fontface+"; color:#FF0000'><B>日</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10pt; font-family:"+fontface+"; color:#666666'><B>一</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10pt; font-family:"+fontface+"; color:#666666'><B>二</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10pt; font-family:"+fontface+"; color:#666666'><B>三</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10pt; font-family:"+fontface+"; color:#666666'><B>四</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='14%' style='font-size:10pt; font-family:"+fontface+"; color:#666666'><B>五</B></FONT></TD>";
		vCode = vCode + "<TD align=center WIDTH='16%' style='font-size:10pt; font-family:"+fontface+"; color:#009900'><B>六</B></FONT></TD>";
		vCode = vCode + "</TR>";
	}

	return vCode;
}

Calendar.prototype.cal_data = function() {
	var vDate = new Date();
	vDate.setDate(1);
	vDate.setMonth(this.gMonth);
	vDate.setFullYear(this.gYear);

	var vFirstDay=vDate.getDay();
	var vDay=1;
	var vLastDay=Calendar.get_daysofmonth(this.gMonth, this.gYear);
	var vOnLastDay=0;
	var vCode = "";

	/*
	Get day for the 1st of the requested month/year..
	Place as many blank cells before the 1st day of the month as necessary.
	*/

	vCode = vCode + "<TR>";
	for (i=0; i<vFirstDay; i++) {
		vCode = vCode + "<TD align=center WIDTH='14%'" + this.write_weekend_string(i) + " style='font-size:10pt; font-family:Verdana, Arial, Helvetica, sans-serif;'></TD>";
	}

	// Write rest of the 1st week
	for (j=vFirstDay; j<7; j++) {
//alert(this.gReturnItem);
		vCode = vCode + "<TD align=center WIDTH='14%'" + this.write_weekend_string(j) + " style='font-size:10pt; font-family:Verdana, Arial, Helvetica, sans-serif;'>" +
			"<A HREF='#' " +
				"onClick=\"self.opener.document." + this.gReturnItem + ".value='" +
				this.format_data(vDay) +
				"';window.close();\">" +
				this.format_day(vDay) +
			"</A>" +
			"</TD>";
		vDay=vDay + 1;
	}
	vCode = vCode + "</TR>";

	// Write the rest of the weeks
	for (k=2; k<7; k++) {
		vCode = vCode + "<TR>";

		for (j=0; j<7; j++) {
			vCode = vCode + "<TD align=center WIDTH='14%'" + this.write_weekend_string(j) + " style='font-size:10pt; font-family: Verdana, Arial, Helvetica, sans-serif;'>" +
				"<A HREF='#' " +
					"onClick=\"self.opener.document." + this.gReturnItem + ".value='" +
					this.format_data(vDay) +
					"';window.close();\">" +
				this.format_day(vDay) +
				"</A>" +
				"</TD>";
			vDay=vDay + 1;

			if (vDay > vLastDay) {
				vOnLastDay = 1;
				break;
			}
		}

		if (j == 6)
			vCode = vCode + "</TR>";
		if (vOnLastDay == 1)
			break;
	}

	// Fill up the rest of last week with proper blanks, so that we get proper square blocks
	for (m=1; m<(7-j); m++) {
		if (this.gYearly)
			vCode = vCode + "<TD align=center WIDTH='14%'" + this.write_weekend_string(j+m) +
			"  style='font-size:10pt;'><FONT FACE='Verdana, Arial, Helvetica, sans-serif' COLOR='gray'> </FONT></TD>";
		else
			vCode = vCode + "<TD align=center WIDTH='14%'" + this.write_weekend_string(j+m) +
			"  style='font-size:10pt;'><FONT FACE='Verdana, Arial, Helvetica, sans-serif' COLOR='gray'>" + m + "</FONT></TD>";
	}

	return vCode;
}

Calendar.prototype.format_day = function(vday) {
	var vNowDay = gNow.getDate();
	var vNowMonth = gNow.getMonth();
	var vNowYear = gNow.getFullYear();

	if (vday == vNowDay && this.gMonth == vNowMonth && this.gYear == vNowYear)
		return ("<FONT COLOR=\"#000066\" ><b>" + vday + "</b></FONT>");
	else
		return (vday);
}

Calendar.prototype.write_weekend_string = function(vday) {
	var i;

	// Return special formatting for the weekend day.
	for (i=0; i<weekend.length; i++) {
		if (vday == weekend[i])
			return (" BGCOLOR=\"" + weekendColor + "\"");
	}

	return "";
}

Calendar.prototype.format_data = function(p_day) {
	var vData;
	var vMonth = 1 + this.gMonth;
	vMonth = (vMonth.toString().length < 2) ? "0" + vMonth : vMonth;
	var vMon = Calendar.get_month(this.gMonth).substr(0,3).toUpperCase();
	var vFMon = Calendar.get_month(this.gMonth).toUpperCase();
	var vY4 = new String(this.gYear);
	var vY2 = new String(this.gYear.substr(2,2));
	var vDD = (p_day.toString().length < 2) ? "0" + p_day : p_day;

	switch (this.gFormat) {
		case "MM\/DD\/YYYY" :
			vData = vMonth + "\/" + vDD + "\/" + vY4;
			break;
		case "MM\/DD\/YY" :
			vData = vMonth + "\/" + vDD + "\/" + vY2;
			break;
		case "MM-DD-YYYY" :
			vData = vMonth + "-" + vDD + "-" + vY4;
			break;
		case "MM-DD-YY" :
			vData = vMonth + "-" + vDD + "-" + vY2;
			break;
		case "YYYY\/MM\/DD":
			vData = vY4 + "\/" + vMonth + "\/" + vDD ;
			break;
		case "YYYY-MM-DD":
			vData = vY4 + "-" + vMonth + "-" + vDD ;
			break;

		case "DD\/MON\/YYYY" :
			vData = vDD + "\/" + vMon + "\/" + vY4;
			break;
		case "DD\/MON\/YY" :
			vData = vDD + "\/" + vMon + "\/" + vY2;
			break;
		case "DD-MON-YYYY" :
			vData = vDD + "-" + vMon + "-" + vY4;
			break;
		case "DD-MON-YY" :
			vData = vDD + "-" + vMon + "-" + vY2;
			break;

		case "DD\/MONTH\/YYYY" :
			vData = vDD + "\/" + vFMon + "\/" + vY4;
			break;
		case "DD\/MONTH\/YY" :
			vData = vDD + "\/" + vFMon + "\/" + vY2;
			break;
		case "DD-MONTH-YYYY" :
			vData = vDD + "-" + vFMon + "-" + vY4;
			break;
		case "DD-MONTH-YY" :
			vData = vDD + "-" + vFMon + "-" + vY2;
			break;

		case "DD\/MM\/YYYY" :
			vData = vDD + "\/" + vMonth + "\/" + vY4;
			break;
		case "DD\/MM\/YY" :
			vData = vDD + "\/" + vMonth + "\/" + vY2;
			break;
		case "DD-MM-YYYY" :
			vData = vDD + "-" + vMonth + "-" + vY4;
			break;
		case "DD-MM-YY" :
			vData = vDD + "-" + vMonth + "-" + vY2;
			break;

		default :
			vData = vMonth + "\/" + vDD + "\/" + vY4;
	}

	return vData;
}

function Build(p_item, p_month, p_year, p_format) {
	var p_WinCal = ggWinCal;
	gCal = new Calendar(p_item, p_WinCal, p_month, p_year, p_format);

	// Customize your Calendar here..
	gCal.gBGColor="white";
	gCal.gLinkColor="black";
	gCal.gTextColor="black";
	gCal.gHeaderColor="orange";

	// Choose appropriate show function
	gCal.show();
}

function show_calendar() {
	/*
		p_month : 0-11 for Jan-Dec; 12 for All Months.
		p_year	: 4-digit year
		p_format: Date format (mm/dd/yyyy, dd/mm/yy, ...)
		p_item	: Return Item.
	*/

	p_item = arguments[0];
	if (arguments[1] == "")
		p_month = new String(gNow.getMonth());
	else
		p_month = arguments[1];
	if (arguments[2] == "" || arguments[2] == "")
		p_year = new String(gNow.getFullYear().toString());
	else
		p_year = arguments[2];
	if (arguments[3] == "")
		p_format = "YYYY-MM-DD";
	else
		p_format = arguments[3];

	version=arguments[4];

	if(version=="e"){
		fontface="Arial, Helvetica, sans-serif";
	}else{
		fontface="Arial, Helvetica, sans-serif";
	}

	vWinCal = window.open("", "Calendar",
		"width=260,height=260,status=no,resizable=no,top=200,left=200");
	vWinCal.opener = self;
	ggWinCal = vWinCal;
	Build(p_item, p_month, p_year, p_format);
}