var weekend = [0,6];

var pageBack = "#FFFFFF"; // Calendar window background colour
var dayNameColor = "#FFFFFF"; // text colour for day name titles
var dayBoxColor = "#000000"; // background colour for day name title boxes
var weekdayColor = "#e4e4e4"; // background colour of weekday day boxes
var weekendColor = "#FFCB05"; // background colour of weekend day boxes
var monthColor = "#000000"; // colour of Current Month title
var monthSize = 2; // size of Current Month title
var fontface = "Verdana"; // self-evident, no?
var fontsize = 2; // self-evident, no?
var linkColor = "#0000ff" // self-evident, no?
var borderColor = "#FFFFFF"; // colour of table border
var navBoxColor = "#FFFFFF"; // colour of navigation table cells
var navBorderColor = "#FFFFFF"; // colour of navigation table border


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

Calendar.Months = ["Enero", "Febrero", "Marzo", "Abril", "Mayo", "Junio",
"Julio", "Agosto", "Septiembre", "Octubre", "Noviembre", "Diciembre"];

// 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 = "#FFFFFF";
	this.gFGColor = "#000000";
	this.gTextColor = "#000000";
	this.gHeaderColor = "#000000";
	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) {
	return Calendar.Months[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 + "<div align='center'><TABLE CELLPADDING='0' CELLSPACING='0' BORDER='0'><TR><TD BGCOLOR=" + borderColor + "><TABLE WIDTH='180' CELLPADDING='2' CELLSPACING='1' BORDER='0'>";
	
	vHeader_Code = this.cal_header();
	vData_Code = this.cal_data();
	vCode = vCode + vHeader_Code + vData_Code;
	
	vCode = vCode + "</TABLE></TD></TR></TABLE></div>";
	
	if (document.layers) {
		vCode = vCode + "<div align='center'><br><FONT FACE='" + fontface + "' SIZE='1'><a href='javascript:window.close();'>close window</a></font></div>"	
		}
	else {
		vCode = vCode + "<div align='center'><br><INPUT style='height:20px;background:#000000;color:#FFCC00;font-family:arial;font-weight:bold;font-size:12px' TYPE='button' ONMOUSEOVER='this.style.background=\"#C0C0C0\"; this.style.color=\"#333333\";' ONMOUSEOUT='this.style.background=\"#000000\"; this.style.color=\"#FFCC00\";' onClick='window.close();' VALUE='Ventana Cercana'></div>"
		}		
	return vCode;
}

Calendar.prototype.show = function() {
	var vCode = "";
	
	this.gWinCal.document.open();

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

	this.wwrite("<body " + 
		"bgcolor=\"" + pageBack + "\" " + 
		"link=\"" + this.gLinkColor + "\" " + 
		"vlink=\"" + this.gLinkColor + "\" " +
		"alink=\"" + this.gLinkColor + "\" " +
		"topmargin='0' leftmargin='0' marginheight='0' marginwidth='0'" +
		"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];
	
	this.wwrite("<div align='center'><TABLE CELLPADDING='0' CELLSPACING='0' BORDER='0'><TR><TD bgcolor=" + navBorderColor + "><TABLE WIDTH='180' BORDER='0' CELLSPACING='1' CELLPADDING='2'><TR><TD bgcolor=" + navBoxColor + " ALIGN=center>");
	this.wwrite("&nbsp;<A title='previous month' HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + prevMM + "', '" + prevYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='/images/cal_prev.gif' width='5' height='12' border='0' alt=''><\/A></TD><TD bgcolor=" + navBoxColor + " ALIGN=center>");	
	this.wwriteA("<FONT SIZE='" + monthSize + "' FACE='" + fontface + "'><B>");
	this.wwriteA(this.gMonthName + " " + this.gYear);
	this.wwriteA("</B><BR>");		
	this.wwrite("</TD><TD bgcolor=" + navBoxColor + " ALIGN=center>");
	this.wwrite("<A title='next month' HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='/images/cal_next.gif' width='5' height='12' border='0' alt=''><\/A>&nbsp;</TD></TR></TABLE></TD></TR></TABLE></div>");

	// 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>Calendar</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=1 CELLSPACING=0 CELLPADDING=0 BGCOLOR='#e0e0e0'><TR><TD ALIGN=center>");
	this.wwrite("[<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', null, '" + prevYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\" alt='Prev Year'><<<\/A>]</TD><TD ALIGN=center>");
	this.wwrite("[<A HREF=\"javascript:window.print();\">Print</A>]</TD><TD ALIGN=center>");
	this.wwrite("[<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', null, '" + nextYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\">>><\/A>]</TD></TR></TABLE><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>";
	vCode = vCode + "<TD WIDTH='14%' bgcolor='" + dayBoxColor + "' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>D</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' bgcolor='" + dayBoxColor + "' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>L</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' bgcolor='" + dayBoxColor + "' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>M</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' bgcolor='" + dayBoxColor + "' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>M</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' bgcolor='" + dayBoxColor + "' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>J</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' bgcolor='" + dayBoxColor + "' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>V</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='16%' bgcolor='" + dayBoxColor + "' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>S</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) + "><FONT SIZE='2' FACE='" + fontface + "'>&nbsp;</FONT></TD>";
	}

	// Write rest of the 1st week
	// when link is clicked, values for departureMonth and departureDay are passed to the main form
	for (j=vFirstDay; j<7; j++) {
		vCode = vCode + "<TD align='center' WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" 
		
		//this condition controls whether the depart date or return date fields are populated
		if (p_item == "departDate") {
			vCode = vCode + "<A HREF=\"javascript:self.opener.document.f.departureMonth.options[" + this.format_data(vDay).substring(0,2) + "].selected=true; self.opener.document.f.departureDay.options[" + this.format_data(vDay).substring(3,5) + "].selected=true; window.close();\">" + this.format_day(vDay) + "</A>" + "</FONT></TD>";
		}
		else if (p_item == "returnDate") {
			vCode = vCode + "<A HREF=\"javascript:self.opener.document.f.returnMonth.options[" + this.format_data(vDay).substring(0,2) + "].selected=true; self.opener.document.f.returnDay.options[" + this.format_data(vDay).substring(3,5) + "].selected=true; 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>";


	// when link is clicked, values for departureMonth and departureDay are passed to the main form
	for (j=0; j<7; j++) {
		vCode = vCode + "<TD align='center' WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" 
		
		
		//this condition controls whether the depart date or return date fields are populated
		if (p_item == "departDate") {
			vCode = vCode + "<A HREF=\"javascript:self.opener.document.f.departureMonth.options[" + this.format_data(vDay).substring(0,2) + "].selected=true; self.opener.document.f.departureDay.options[" + this.format_data(vDay).substring(3,5) + "].selected=true; window.close();\">" + this.format_day(vDay) + "</A>" + "</FONT></TD>";
		}
		else if (p_item == "returnDate") {
			vCode = vCode + "<A HREF=\"javascript:self.opener.document.f.returnMonth.options[" + this.format_data(vDay).substring(0,2) + "].selected=true; self.opener.document.f.returnDay.options[" + this.format_data(vDay).substring(3,5) + "].selected=true; 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'>&nbsp;</FONT></TD>";
		else
			vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j+m) + 
			"><FONT SIZE='2' FACE='" + fontface + "' COLOR='gray'>&nbsp;</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=\"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 (" BGCOLOR=\"" + weekdayColor + "\"");
}

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 "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 = "#FFFFFF";
	gCal.gLinkColor = linkColor;
	gCal.gTextColor = monthColor;
	gCal.gHeaderColor = dayNameColor;

	// 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.
	*/
	
	var winWidth = 320;
	var winHeight = 300;
	var winLeft = (screen.width - winWidth)/2;
	var winTop = (screen.height - winHeight)/2;		

	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 = "MM/DD/YYYY";
	else
		p_format = arguments[3];

	vWinCal = window.open("", "Calendar", "status=no,resizable=no,top=" + winTop + ",left=" + winLeft + ",width=200,height=230");
	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 = "MM/DD/YYYY";

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

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