var weekend = [0,6];
var weekendColor = "#88bbee";
var fontface = "Verdana";
var fontsize = 2;

var gNow = new Date();
var ggWinCal;
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.Ruta = ["mardel013.gif", "corrientes.gif", "caminito.gif", "trendelasnubes.gif", "chubut.gif", "valdez.gif",
"peritomoreno.gif", "chubutglaciartorrecillas.jpg", "santacruz.gif", "misiones.gif", "talampaya.gif", "casadegobierno.gif", "palmar.gif", "riohondo.gif", "panaramica.gif",
"valledelaluna.gif", "termas.gif", "cataratas.gif", "glaciar.gif", "mendoza.gif", "jujuy.gif", "humahuaca.gif", "antartida.gif", "pampa.gif", "pampa2.gif", "ballena.gif", 
"congreso.gif", "necochea.gif"];

Calendar.Alt = ["Mar del Plata - Buenos Aires", "Corrientes", "Caminito - Buenos Aires", "Tren de las Nubes - Salta", "Chubut", "Peninsula de Valdez - Chubut",
"Perito Moreno - Santa Cruz", "Glaciar Torrecillas - Chubut", "Santa Cruz", "Cataratas del Iguazu - Misiones", "Talampaya - La Rioja", "Casa de Gobierno - Buenos Aires", "El Palmar - Entre Rios", "Rio Hondo - Santiago del Estero",
"Panoramica - Buenos Aires", "Valle de la Luna - San Juan", "Termas de Copahue - Neuquén", "Cataratas del Iguazú - Misiones", "Perito Moreno - Santa Cruz", "Cordillera de Los Andes - Mendoza", "Pumamarca - Jujuy", "Quebarada de Humahuca - Jujuy", "Pasaje de Drake - Antartida",
"La Pampa", "Estancia - La Pampa", "Peninsula de Valdez - Chubut", "Congreso - Buenos Aires", "Necochea - Buenos Aires"];

// 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.gRuta = null;
		this.gAlt = null;
		this.gYearly = true;
	} else {
		this.gMonthName = Calendar.get_month(p_month);		
		var i = Math.round(27 * Math.random());				
		this.gRuta = Calendar.get_ruta(i);
		this.gAlt = Calendar.get_alt(i);		
		this.gMonth = new Number(p_month);		
		this.gYearly = false;
	}

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

Calendar.get_month = Calendar_get_month;
Calendar.get_ruta = Calendar_get_ruta;
Calendar.get_alt = Calendar_get_alt;
Calendar.get_daysofmonth = Calendar_get_daysofmonth;
Calendar.calc_month_year = Calendar_calc_month_year;
Calendar.print = Calendar_print;

function Calendar_get_month(monthNo) {
	return Calendar.Months[monthNo];
}

function Calendar_get_ruta(monthNo) {
	return Calendar.Ruta[monthNo];
}

function Calendar_get_alt(monthNo) {
	return Calendar.Alt[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_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 + "<TABLE BORDER=0 BGCOLOR=\"" + this.gBGColor + "\">";
	
	vHeader_Code = this.cal_header();
	vData_Code = this.cal_data();
	vCode = vCode + vHeader_Code + vData_Code;
	
	vCode = vCode + "</TABLE>";
	
	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 TOPMARGIN=10 " + 
		"link=\"" + this.gLinkColor + "\" " + 
		"vlink=\"" + this.gLinkColor + "\" " +
		"alink=\"" + this.gLinkColor + "\" " +
		"text=\"" + this.gTextColor + "\">");
	
	
	// 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]; //99ccff
	
	this.wwrite("<TABLE WIDTH='100%' BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR='#DDE9F5'>");
	
	this.wwrite("<TR HEIGHT=20><TD ALIGN=center style='border:2.5px solid #D0dce7;border-right:0px;'><FONT COLOR='#FFFFFF' FACE=ARIAL SIZE=2>");
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)-1) + "', '" + this.gFormat + "'" +
		");" +
		"\"><<<\/A></FONT></TD><TD ALIGN=center style='border:2.5px solid #D0dce7;border-right:0px;border-left:0px;'><FONT COLOR='#FFFFFF' FACE=ARIAL SIZE=2>");
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + prevMM + "', '" + prevYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><<\/A></FONT></TD>");
	this.wwriteA("<TD ALIGN=center width='55%' style='border:2.5px solid #D0dce7;border-right:0px;border-left:0px;'><CENTER><FONT FACE='" + fontface + "' SIZE=2>");
	this.wwriteA(this.gMonthName + " " + this.gYear);
	this.wwriteA("</CENTER></TD>");
	this.wwrite("<TD ALIGN=center style='border:2.5px solid #D0dce7;border-right:0px;border-left:0px;'><FONT COLOR='#FFFFFF' FACE=ARIAL SIZE=2>");
		
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\">><\/A></FONT></TD>");
	this.wwrite("<TD ALIGN=center style='border:2.5px solid #D0dce7;border-left:0px;'><FONT COLOR='#FFFFFF' FACE=ARIAL SIZE=2><A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)+1) + "', '" + this.gFormat + "'" +
		");" +
		"\">>><\/A></FONT></TD></TR>");
	
	this.wwrite("<tr height=5 bgcolor=#ffffff><td colspan=5></td></tr>");
	
	this.wwrite("<TR HEIGHT=50 bgcolor=#ffffff><td align=center colspan=5><img src='../images/Calendar/");		
	this.wwrite(this.gRuta+"'");
	this.wwrite(" Alt=");
	this.wwrite("'"+this.gAlt+" - Argentina'");
	this.wwrite("></td></tr><tr height=10 bgcolor=#ffffff><td colspan=5></td></tr>");
	
	this.wwrite("</TABLE>");

	// 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.showY = function() {
	var vCode = "";
	var i;
	var vr, vc, vx, vy;		// Row, Column, X-coord, Y-coord
	var vxf = 285;			// X-Factor
	var vyf = 200;			// Y-Factor
	var vxm = 10;			// X-margin
	var vym;				// Y-margin
	if (isIE)	vym = 75;
	else if (isNav)	vym = 25;
	
	this.gWinCal.document.open();

	this.wwrite("<html>");
	this.wwrite("<head><title>Calendario</title>");
	this.wwrite("<style type='text/css'>\n<!--");
	for (i=0; i<12; i++) {
		vc = i % 3;
		if (i>=0 && i<= 2)	vr = 0;
		if (i>=3 && i<= 5)	vr = 1;
		if (i>=6 && i<= 8)	vr = 2;
		if (i>=9 && i<= 11)	vr = 3;
		
		vx = parseInt(vxf * vc) + vxm;
		vy = parseInt(vyf * vr) + vym;

		this.wwrite(".lclass" + i + " {position:absolute;top:" + vy + ";left:" + vx + ";}");
	}
	this.wwrite("-->\n</style>");
	this.wwrite("</head>");

	this.wwrite("<body " + 
		"link=\"" + this.gLinkColor + "\" " + 
		"vlink=\"" + this.gLinkColor + "\" " +
		"alink=\"" + this.gLinkColor + "\" " +
		"text=\"" + this.gTextColor + "\">");
	this.wwrite("<FONT FACE='" + fontface + "' SIZE=2><B>");
	this.wwrite("Year : " + this.gYear);
	this.wwrite("</B><BR>");

	// Show navigation buttons
	var prevYYYY = parseInt(this.gYear) - 1;
	var nextYYYY = parseInt(this.gYear) + 1;
	
	this.wwrite("<TABLE WIDTH='100%' BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR='#99ccff'><TR HEIGHT=20><TD ALIGN=center><FONT COLOR='#FFFFFF' FACE=ARIAL SIZE=2>");
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', null, '" + prevYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\" alt='Prev Year'><<<\/A></FONT></TD><TD ALIGN=center><FONT COLOR='#FFFFFF' FACE=ARIAL SIZE=2>");
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', null, '" + nextYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\">>><\/A></FONT></TD></TR><BR>");

	// Get the complete calendar code for each month..
	var j;
	for (i=11; i>=0; i--) {
		if (isIE)
			this.wwrite("<DIV ID=\"layer" + i + "\" CLASS=\"lclass" + i + "\">");
		else if (isNav)
			this.wwrite("<LAYER ID=\"layer" + i + "\" CLASS=\"lclass" + i + "\">");

		this.gMonth = i;
		this.gMonthName = Calendar.get_month(this.gMonth);
		vCode = this.getMonthlyCalendarCode();
		this.wwrite(this.gMonthName + "/" + this.gYear + "<BR>");
		this.wwrite(vCode);

		if (isIE)
			this.wwrite("</DIV>");
		else if (isNav)
			this.wwrite("</LAYER>");
	}

	this.wwrite("</font><BR></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 = "";
	
	vCode = vCode + "<TR BGCOLOR=#006699>";
	vCode = vCode + "<TD WIDTH='14%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Su</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Mo</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Tue</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>We</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Thu</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Fri</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='16%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Sa</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 WIDTH='14%'" + this.write_weekend_string(i) + "><FONT SIZE='2' FACE='" + fontface + "'> </FONT></TD>";
	}

	// Write rest of the 1st week
	for (j=vFirstDay; j<7; j++) {
		vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" + 
			"<A HREF='#' " + 
			        "onClick=\"self.opener.document." + this.gReturnItem + ".value='" + 
				this.format_data(vDay) + 
				"';window.close();\">" + 
				this.format_day(vDay) + 
			"</A>" + 
			"</FONT></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 WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" + 
				"<A HREF='#' " + 
					"onClick=\"self.opener.document." + this.gReturnItem + ".value='" + 
					this.format_data(vDay) + 
					"';window.close();\">" + 
				this.format_day(vDay) + 
				"</A>" + 
				"</FONT></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 WIDTH='14%'" + this.write_weekend_string(j+m) + 
			"><FONT SIZE='2' FACE='" + fontface + "' COLOR='gray'> </FONT></TD>";
		else
			vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j+m) + 
			"><FONT SIZE='2' FACE='" + fontface + "' COLOR='gray'>" + m + "</FONT></TD>";
	}
	vCode= vCode + "<TR><TD BGCOLOR=#ECECEC COLSPAN=7><CENTER><FONT COLOR='#ECECEC' SIZE='2' FACE='Arial'><B><A HREF='#' onClick=\"self.opener.document." + this.gReturnItem + ".value=self.opener.document."+this.gReturnItem+".value;window.close();\">Close</A></B></CENTER></FONT></TD></TR></TABLE>";

	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=\"RED\"><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 month = 1 + this.gMonth;
	month = (month.toString().length < 2) ? "0" + month : month;
	//var vMon = Calendar.get_month(this.gMonth).substr(0,3).toUpperCase();	
	var year = new String(this.gYear);	
	var year2 = new String(this.gYear.substr(2,2));
	var day = (p_day.toString().length < 2) ? "0" + p_day : p_day;
	
	switch (format) {
		case "112" :		
			vData = year + month + day;
			break;
		case "12" :
			vData = year2 + month + day;
			break;
		case "111" :	
			vData = year + "/" + month + "/" + day;
			break;
		case "11" :	
			vData = year2 + "/" + month + "/" + day;
			break;
		case "10" :
			vData = month + "-" + day + "-" + year;
			break;	
		case "110" :
			vData = month + "-" + day + "-" + year2;
			break;	
		case "105" :
			vData = day + "-" + month + "-" + year;
			break;	
		case "5" :
			vData = day + "-" + month + "-" + year2;
			break;		
		case "104" :
			vData = day + "." + month + "." + year;
			break;	
		case "4" :
			vData = day + "." + month + "." + year2;
			break;			
		case "103" :		
			vData = day + "/" + month + "/" + year;
			break;
		case "3" :		
			vData = day + "/" + month + "/" + year2;
			break;
		case "102" :
			vData = year + "." + month + "." + day;
			break;	
		case "2" :
			vData = year2 + "." + month + "." + day;
			break;	
		case "101" :
			vData = month + "/" + day + "/" + year;
			break;	
		case "1" :
			vData = month + "/" + day + "/" + year2;
			break;		
		case "100" :
			vData = month + " " + day + " " + year;
			break;			
		default	   :
			vData = day + "/" + month + "/" + year;
			break;			
	}
	
	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="white";

	// Choose appropriate show function
	if (gCal.gYearly)	gCal.showY();
	else	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] == null)
		p_month = new String(gNow.getMonth());
	else
		p_month = arguments[1];
	if (arguments[2] == "" || arguments[2] == null)
		p_year = new String(gNow.getFullYear().toString());
	else
		p_year = arguments[2];
	if (arguments[3] == null)
		p_format = "DD/MM/YYYY";
	else
		p_format = arguments[3];

	vWinCal = window.open("", "Calendario", 
		"width=215,height=350,status=yes,resizable=no,top=300,left=600");
		
	vWinCal.opener = self;
	ggWinCal = vWinCal;

	Build(p_item, p_month, p_year, p_format);
}
/*
Yearly Calendar Code Starts here
*/
function show_yearly_calendar(p_item, p_year, p_format) {
	// Load the defaults..
	if (p_year == null || p_year == "")
		p_year = new String(gNow.getFullYear().toString());
	if (p_format == null || p_format == "")
		p_format = "DD/MM/YYYY";

	var vWinCal = window.open("", "Calendario", "scrollbars=yes");
	vWinCal.opener = self;
	ggWinCal = vWinCal;

	Build(p_item, null, p_year, p_format);
}