<!-- Original:  Kedar R. Bhave (softricks@hotmail.com) -->

var weekend = [0,6];
var weekendColor = "#C7CFD9";
var fontface = "Arial";
var fontsize = 3;

var gToday = new Date();
var gNow = null;
var ggWinCal;
var gDigits = "0123456789";
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];

// Data added by us
var allowPast = true;

function hideLink(vDay,vDate)
{
 if (allowPast)
  return false;
  
 
 if ( vDate.getYear() > gNow.getYear() )
  return false;
  
 if ( vDate.getYear() < gNow.getYear() )
  return true;
 
 // We are dealing with current year....
 
 if ( vDate.getMonth() > gNow.getMonth() )
  return false;
  
 if ( vDate.getMonth() < gNow.getMonth() )
  return true;
 
 // We are dealing with current month
 if ( vDay < gNow.getDate() )
  return true;
  
 return false;
}

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 = "white";
	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  style='border: 2px #0F3063 solid;' BORDER=0 CELLPADDING=2 CELLSPACING=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>");
	if (this.gReturnItem.indexOf("(") > 0) {
	    var callstr = this.gReturnItem.substring(0,this.gReturnItem.length-1);
		this.wwrite("<script>function addNewDate(datestr){ self.opener." + callstr + "datestr); }</script>");
	}
	else {
		this.wwrite("<script>function addNewDate(datestr){ self.opener.document." + this.gReturnItem + ".value=datestr; }</script>");
	}
	this.wwrite("</head>");

	this.wwrite("<body  onLoad='self.focus();'" + 
		"link=\"" + this.gLinkColor + "\" " + 
		"vlink=\"" + this.gLinkColor + "\" " +
		"alink=\"" + this.gLinkColor + "\" " +
		"text=\"" + this.gTextColor + "\">");
	this.wwriteA("<center><FONT FACE='" + fontface + "' SIZE=2><B>");
	this.wwriteA(this.gMonthName + " " + this.gYear);
	this.wwriteA("</B></center>");

	// 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 ALIGN='CENTER' BORDER=0 CELLSPACING=0 CELLPADDING=2 BGCOLOR='#FFFFFF'><TR><TD ALIGN=center>");
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)-1) + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='\/images\/calendar\/fastrewind.gif' alt='Fast Back' border='0'><\/A></TD><TD ALIGN=center>");
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + prevMM + "', '" + prevYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='\/images\/calendar\/rewind.gif' alt='Back' border='0'><\/A></TD><TD ALIGN=center>");
		/* don't need the print function
	this.wwrite("[<A HREF=\"javascript:window.print();\">Print</A>]</TD><TD ALIGN=center>");
	    */
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='\/images\/calendar\/forward.gif' alt='Forward' border='0'><\/A></TD><TD ALIGN=center>");
	this.wwrite("<A HREF=\"" +
		"javascript:window.opener.Build(" + 
		"'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)+1) + "', '" + this.gFormat + "'" +
		");" +
		"\"><img src='\/images\/calendar\/fastforward.gif' alt='Fast Forward' border='0'><\/A></TD></TR></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>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>");
	if (this.gReturnItem.indexOf("(") > 0) {
	    var callstr = this.gReturnItem.substring(0,this.gReturnItem.length-1);
		this.wwrite("<script>function addNewDate(datestr){ self.opener." + callstr + "datestr); }</script>");
	}
	else {
		this.wwrite("<script>function addNewDate(datestr){ self.opener.document." + this.gReturnItem + ".value=datestr; }</script>");
	}
	this.wwrite("</head>");

	this.wwrite("<body onLoad='self.focus();' " + 
		"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>");

	// 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>");

	// 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);
		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='36578C'>";
	vCode = vCode + "<TD WIDTH='15%' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='white'><B>Sun</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='white'><B>Mon</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='white'><B>Tue</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='white'><B>Wed</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='white'><B>Thu</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='14%' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='white'><B>Fri</B></FONT></TD>";
	vCode = vCode + "<TD WIDTH='15%' align='center'><FONT SIZE='2' FACE='" + fontface + "' COLOR='white'><B>Sat</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 bgcolor='#DBDBE0'>";	
	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
	for (j=vFirstDay; j<7; j++) {
		vCode = vCode + "<TD align='center' WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>";
		    if ( hideLink(vDay,vDate) ) {
			 vCode = vCode + vDay;
			} else {
			 vCode = vCode + "<A HREF='#' " + 
				"onClick=\"addNewDate('" +
				this.format_data(vDay) + 
				"');window.close();\">" + 
				this.format_day(vDay) + 
			"</A>";
		   }
		   vCode = vCode + "</FONT></TD>";
			
		vDay=vDay + 1;
	}
	vCode = vCode + "</TR>";

	// Write the rest of the weeks
	for (k=2; k<7; k++) {
		vCode = vCode + "<TR bgcolor='#DBDBE0'>";

		for (j=0; j<7; j++) {
			vCode = vCode + "<TD align='center' WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>";
		    if ( hideLink(vDay,vDate) ) {
			 vCode = vCode + vDay;
			} else {
				vCode = vCode + "<A HREF='#' " + 
					"onClick=\"addNewDate('" +
					this.format_data(vDay,vDate) + 
					"');window.close();\">" + 
				this.format_day(vDay) + 
				"</A>";
			}
			vCode = vCode +	"</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 align='center' WIDTH='14%'" + this.write_weekend_string(j+m) + 
			"><FONT SIZE='2' FACE='" + fontface + "' COLOR='gray'>&nbsp;</FONT></TD>";
		else
			vCode = vCode + "<TD align='center' WIDTH='14%'" + this.write_weekend_string(j+m) + 
			"><FONT SIZE='2' 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 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 vMonth = 1 + this.gMonth;
	vMonth = (vMonth.toString().length < 2) ? "0" + vMonth : vMonth;
	var vMon = Calendar.get_month(this.gMonth).substr(0,3);
	var vY4 = new String(this.gYear);
	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 "MON DD, YYYY" :
		default:
			vData = vMon + " " + vDD + ", " + vY4;
	}

	return vData;
}

// accepts mm/dd/yyyy or mm/dd
function getDateFromString(p_datestr) {
    var newstr;
    var vMon;
	var vDay;
	var vYear;
	var i;
	// try it first
    var vDate = new Date( p_datestr );
	if (isNaN(vDate.getTime()) == false)
	  return vDate;
    
    if (p_datestr == null || p_datestr.length <= 0)
	   return null;

    // trim the value
	newstr = "";
	for (i=0; i < p_datestr.length; i++) {
	  var ch = p_datestr.charAt(i);
	  if (ch != " ") {
	     if (gDigits.indexOf(ch) >= 0) {
		   newstr += ch;
		 }
		 else if (ch == "-" || ch == "/" || ch == ".")
		   newstr += "\/";
		 }
	}
	
	if (newstr.length <= 0)
	   return null;
	   
	// get the month
	var firstndx = newstr.indexOf("\/");
	if (firstndx <= 0 || firstndx >= (newstr.length-1))
	  return null;
	  
	vMon = newstr.substring(0,firstndx);
	var secondndx = newstr.indexOf("\/", firstndx+1);
	if (secondndx < 0) {
	   secondndx = newstr.length;
	}
	
	vDay = newstr.substring(firstndx+1,secondndx);
	if (secondndx >= (newstr.length-1)) {
	  vYear = gToday.getFullYear().toString();
    }
	else {
	  vYear = newstr.substring(secondndx+1);
	  if (vYear.length > 4)
	    return null;
	  if (vYear.length < 4)
	    vYear = "" + (parseInt(vYear,10) + 2000);
	}
    
	vDate = new Date();
	vDate.setYear( parseInt(vYear,10) );
	vDate.setMonth( parseInt(vMon,10)-1 );
	vDate.setDate( parseInt(vDay,10) );
	
	return vDate;
}

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="#31428C";

	// Choose appropriate show function
	if (gCal.gYearly)	gCal.showY();
	else	gCal.show();
}

function show_calendar() {
	/* 
		p_item	 : Return Item.
		p_datenow: String representing the selected date, or null for today. Format: same as p_format
		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 = arguments[0];
	
	if (arguments[1] != null)
	    gNow = getDateFromString(arguments[1]);
	if (gNow == null)
	    gNow = gToday;
	
	if (arguments[2] == null)
		p_month = new String(gNow.getMonth());
	else
		p_month = arguments[1];
	if (arguments[3] == "" || arguments[2] == null)
		p_year = new String(gNow.getFullYear().toString());
	else
		p_year = arguments[2];
	if (arguments[4] == null)
		p_format = "MON DD, YYYY";
	else
	    p_format = arguments[3];
		
	if ( arguments[5] != null && arguments[5] == false )
	  allowPast = false;
	  
	vWinCal = window.open("", "Calendar", 
		"width=250,height=250,status=no,resizable=no,top=200,left=200");
	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);
}