var weekend = [0,6];
var weekendColor = "#E1F4FD";
var dailyColor = "#FFFFFF";
var headerbgColor= "#C0C0C0";
var fontface = "Verdana";
var fontsize = 1;

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"];

// 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) {
	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 + "<TABLE ALIGN=\"CENTER\" BORDER=0 CELLSPACING=1 CELLPADDING=1 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 " + 
		"leftmargin=\"0\" " +
		"topmargin=\"0\" " +
		"link=\"" + this.gLinkColor + "\" " + 
		"vlink=\"" + this.gLinkColor + "\" " +
		"alink=\"" + this.gLinkColor + "\" " +
		"text=\"" + this.gTextColor + "\">");
	this.wwriteA("<form name=calform action=\"\">");

	//this.wwriteA("<FONT FACE='" + fontface + "' SIZE='" + fontsize + "'><B>");
	//this.wwriteA(this.gMonthName + " " + this.gYear);
	//this.wwriteA("</B>");
	
	// 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("<TABLE WIDTH='100%' ALIGN=\"center\" BORDER=0 CELLSPACING=1 CELLPADDING=0 BGCOLOR='#1462AD'><TR><TD ALIGN=center>");
//	this.wwrite("<A HREF=\"" +
//		"javascript:window.opener.Build(" + 
//		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)-1) + "', '" + this.gFormat + "'" +
//		");" +
//		"\"><FONT SIZE='" + fontsize + "' FACE='" + fontface + "'><<</FONT><\/A></TD><TD ALIGN=center>");
	this.wwrite("&nbsp;<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + prevMM + "', '" + prevYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><font color=\"#ffffff\" style=\"text-decoration: none;\"><b>&lt;&lt;</font><\/A></TD><TD ALIGN=center>");

	//this.wwrite("[<A HREF=\"javascript:window.print();\">Print</A>]</TD><TD ALIGN=center>");
	this.wwrite("<SELECT name=\"Date\" onchange=\"javascript:window.opener.BuildDate(this,'" + this.gReturnItem + "', '" + this.gFormat + "');\" STYLE=\"font-size: 10px; font-face: Arial;\" >");
	var vYear = this.gYear - 1;
	var vMonth = 1;
	var vYearMax = vYear + 3;
	var vStart = vMonth;
	var vSelect = "";
	for (j=vYear; j<vYearMax; j++) {
		
		for (i=vStart; i<=11; i++) {	
			
			if ((this.gYear == j) && (this.gMonth == i))
			{
				vSelect ="selected";
			} else{
				vSelect ="";
			}
			
			this.wwrite("<option value=\"" + j + i + "\" " + vSelect + ">" + j + " " + Calendar.get_month(i) ); 
		}
		vStart = 0  
	}
	this.wwrite("</SELECT></TD><TD ALIGN=center>");
	
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><font color=\"#ffffff\" style=\"text-decoration: none;\"><b>&gt;&gt;</b></FONT><\/A>&nbsp;</TD></TR></TABLE><BR>");
	

//	this.wwrite("<A HREF=\"" +
//		"javascript:window.opener.Build(" + 
//		"'" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "'" +
//		");" +
//		"\"><FONT SIZE='" + fontsize + "' FACE='" + fontface + "'>></FONT><\/A></TD><TD ALIGN=center>");
//	this.wwrite("<A HREF=\"" +
//		"javascript:window.opener.Build(" + 
////		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)+1) + "', '" + this.gFormat + "'" +
//		");" +
//		"\"><FONT SIZE='" + fontsize + "' FACE='" + fontface + "'>>></FONT><\/A></TD></TR></TABLE><BR>");

	// Get the complete calendar code for the month..
	vCode = this.getMonthlyCalendarCode();
	this.wwrite(vCode); 
 
	this.wwrite("<br><table cellpadding=1 cellspacing=0 bgcolor=\"#1462AD\"align=\"center\"><tr><td><A HREF=\"javascript:window.close();\"><font color=\"#ffffff\" style=\"text-decoration: none;\"><b>&nbsp;close&nbsp;</b></font></A></td></tr></table>");
	
	
//	this.wwrite("<br><table cellpadding=1 cellspacing=0 bgcolor=\"#1462AD\"align=\"center\"><tr><td><A HREF=\"javascript:alert(window.opener.document.forms['searchForm']);\"><font color=\"#ffffff\" style=\"text-decoration: none;\"><b>&nbsp;test&nbsp;</b></font></A></td></tr></table>");
	
	this.wwrite("</font></form></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%' ALIGN=\"CENTER\" BGCOLOR='" + headerbgColor + "'><FONT SIZE='" + fontsize + "' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Su</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' ALIGN=\"CENTER\" BGCOLOR='" + headerbgColor + "'><FONT SIZE='" + fontsize + "' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Mo</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' ALIGN=\"CENTER\" BGCOLOR='" + headerbgColor + "'><FONT SIZE='" + fontsize + "' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Tu</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' ALIGN=\"CENTER\" BGCOLOR='" + headerbgColor + "'><FONT SIZE='" + fontsize + "' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>We</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' ALIGN=\"CENTER\" BGCOLOR='" + headerbgColor + "'><FONT SIZE='" + fontsize + "' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Th</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' ALIGN=\"CENTER\" BGCOLOR='" + headerbgColor + "'><FONT SIZE='" + fontsize + "' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Fr</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='16%' ALIGN=\"CENTER\" BGCOLOR='" + headerbgColor + "'><FONT SIZE='" + fontsize + "' 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='" + fontsize + "' 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='" + fontsize + "' FACE='" + fontface + "'>" + 
			"<A HREF='#' " + 
				"onClick=\"self.opener.document." + this.gReturnItem + ".value='" + 
				this.format_data(vDay) + 
				"';self.opener.document." + this.gReturnItem + ".onchange(); 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='" + fontsize + "' FACE='" + fontface + "'>" + 
				"<A HREF='#' " + 
					"onClick=\"self.opener.document." + this.gReturnItem + ".value='" + 
					this.format_data(vDay) + 
					"';self.opener.document." + this.gReturnItem + ".onchange(); 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='" + fontsize + "' FACE='" + fontface + "' COLOR='gray'> </FONT></TD>";
		else
			vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j+m) + 
			"><FONT SIZE='" + fontsize + "' FACE='" + fontface + "' 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 STYLE=\"text-decoration:none;\" COLOR=\"RED\"><B>" + vday + "</B></FONT>");
	else
		return ("<FONT STYLE=\"text-decoration:none;\"><B>" + vday + "</B></FONT>");
}

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 (" ALIGN=CENTER BGCOLOR=\"" + weekendColor + "\"");
	}
	
	return (" ALIGN=CENTER BGCOLOR=\"" + dailyColor + "\"");;
}

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 BuildDate(field,pItem,pFormat)
{	
	var vDateCode = field[field.selectedIndex].value;	
	var vYear 	= vDateCode.substring(0,4);	
	var vMonth 	= vDateCode.substring(4,vDateCode.length);
	Build(pItem,vMonth,vYear, pFormat);
}

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="#E1F4FD";
	gCal.gLinkColor="black";
	gCal.gTextColor="black";
	gCal.gHeaderColor="black";

	// Choose appropriate show function
	//if (gCal.gYearly)	gCal.showY();
	//else	gCal.show();
	if (gCal.gYearly)	gCal.show();
	else	gCal.show();	
}

function popup_calendar(pItem,pDate,x,y) 
{	
	if (pDate.length == 10) 
	{	
		var vYear 	= pDate.substring(6,10);
		var vMonth 	= pDate.substring(0,2);	
		show_calendar(pItem,vMonth-1,vYear,null,x,y);
	}	
	else
	{
		show_calendar(pItem,null,null,null,x,y);
	}	
}

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 windowX = 100;
	var windowY = 100;
	
	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];

	if (arguments[4] == null)
		windowX = 100;
	else
		windowX = arguments[4];

	if (arguments[5] == null)
		windowX = 100;
	else
		windowY = arguments[5];

	vWinCal = window.open("", "Calendar", 
		"width=170,height=190,status=no,resizable=no,border=no,top=" + windowX +",left=" + windowY +"\"");
	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);
}

