/* ********************************************************************
Softricks Javascript Calendar
Author : Kedar R. Bhave

Modification History :-
v1.0    1st Jan 2000.
v1.2    Added Navigation buttons, and Print capability.
v1.21   Bugfixes, Highlighted Weekend days
v1.22   Includes first days for the next month (grayed-out) in the month  
                view (after the last day of the month).
        Added support for MONTH DD, YYYY format. (09/13)
        Fixed a bug. Year/Month values were assumed to be passed as strings.

# COPYRIGHT NOTICE
# Copyright (c) 2000 Softricks.com, All rights reserved.
# This script may be used and modified free of charge by anyone as long as
# this copyright notice and the comments above are kept in their original 
# form. By using this script, you agree to the disclaimer notices as on the
# softricks.com site.
#
# Selling the code for this script, without prior written consent from the
# author, is not allowed. Redistributing this script over the internet or 
# in any medium should be done only with author's written permission.
#
# In all cases copyright and headers must remain intact.
#
# Distributed under the GNU General Public License.
# For more information visit: http://www.gnu.org/copyleft/lgpl.html
******************************************************************** */
var weekend = [0,6];
//var weekendColor = "#e0e0e0";
//var fontface = "Verdana";
//var fontsize = 2;

var gNow = new Date();
var ggWinCal;           // Really global variable pointing to the calendar window

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,p_callback) {
        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;
		this.gCallBack = p_callback
}

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();
}

// 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 + "\">";
        vCode = vCode + "<TABLE width=\"100%\" BORDER=\"0\" class=\"calendarBody\">";
        
        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 marginwidth=\"0\" marginheight=\"0\"" + 
          //      "link=\"" + this.gLinkColor + "\" " + 
            //    "vlink=\"" + this.gLinkColor + "\" " +
              //  "alink=\"" + this.gLinkColor + "\" " +
                //"text=\"" + this.gTextColor + "\" onLoad=\"this.focus()\">");
		//this.wwrite("<body marginwidth=\"0\" marginheight=\"0\" onLoad=\"this.focus()\">");
		this.wwrite("<body class=\"calendar\"onLoad=\"this.focus()\">");
        //this.wwriteA("<FONT FACE='" + fontface + "' SIZE=2><B>");
        //this.wwriteA(this.gMonthName + " " + this.gYear);
        //this.wwriteA("</B><BR>");

        // 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("<link href=\"/lib/calendar2/calendar.css\" rel=\"stylesheet\" type=\"text/css\">");
        
        this.wwrite("<table class=\"calendarHeading\" WIDTH=\"100%\" BORDER=\"0\" CELLSPACING=\"0\" CELLPADDING=\"0\"><TR>");
       // this.wwrite("<TD ALIGN=center>[<A HREF=\"" + "javascript:window.opener.Build(" + "'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)-1) + "', '" + this.gFormat + "'" + ");" + "\"><<<\/A>]</TD>");
        this.wwrite("<TD ALIGN=center><A HREF=\"" + "javascript:window.opener.Build('" + this.gReturnItem + "', '" + prevMM + "', '" + prevYYYY + "', '" + this.gFormat + "','" + this.gCallBack + "');\">&lt;<\/A></TD>");
       //this.wwrite("<TD ALIGN=center>[<A HREF=\"javascript:window.print();\">Print</A>]</TD>");
	   this.wwrite("<TD ALIGN=center class=\"monthYear\">");
	    this.wwriteA(this.gMonthName + " " + this.gYear);
	   this.wwrite("</TD>");
        this.wwrite("<TD ALIGN=center><A HREF=\"" + "javascript:window.opener.Build('" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "','" + this.gCallBack + "');\">&gt;<\/A></TD>");
       // this.wwrite("<TD ALIGN=center><A HREF=\"#\" onClick=\"window.opener.Build('" + this.gReturnItem + "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "');\">&gt;<\/A></TD>");
       // this.wwrite("<TD ALIGN=center>[<A HREF=\"" + "javascript:window.opener.Build(" +  "'" + this.gReturnItem + "', '" + this.gMonth + "', '" + (parseInt(this.gYear)+1) + "', '" + this.gFormat + "'" + ");" + "\">>><\/A>]</TD></TR></TABLE>");

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

        this.wwrite("</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=\"0\" 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 class=\"dayHeader\" WIDTH='14%'>Sun</TD>";
        vCode = vCode + "<td class=\"dayHeader\" WIDTH='14%'>Mon</TD>";
        vCode = vCode + "<td class=\"dayHeader\" WIDTH='14%'>Tue</TD>";
        vCode = vCode + "<td class=\"dayHeader\" WIDTH='14%'>Wed</TD>";
        vCode = vCode + "<td class=\"dayHeader\" WIDTH='14%'>Thu</TD>";
        vCode = vCode + "<td class=\"dayHeader\" WIDTH='14%'>Fri</TD>";
        vCode = vCode + "<td class=\"dayHeader\" WIDTH='16%'>Sat</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) + ">&nbsp;</TD>";
        }

        // Write rest of the 1st week
        for (j=vFirstDay; j<7; j++) {
                vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><A HREF=\"\" onClick=\"self.opener.document." + this.gReturnItem + ".value='" + this.format_data(vDay) + "';" + this.gCallBack + ";window.close();\">" + this.format_day(vDay) +  "</A></TD>";
                //vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><A HREF=\"javascript: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 WIDTH='14%'" + this.write_weekend_string(j) + "><A HREF=\"\" onClick=\"self.opener.document." + this.gReturnItem + ".value='" + this.format_data(vDay) + "';" + this.gCallBack + ";window.close();\">" + this.format_day(vDay) + "</A></TD>";
						//vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><A HREF=\"javascript: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 WIDTH='14%'" + this.write_weekend_string(j+m) + ">&nbsp;</TD>";
                else
                        //vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j+m) + ">" + m + "</TD>";
						vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j+m) + ">&nbsp;</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 ("<span class=\"today\">" + vday + "</span>");
        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 (" class=\"weekend\"");
		}
        
        return (" class=\"weekday\"");
}

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 vMon = Calendar.get_month(this.gMonth).substr(0,3);
        //var vFMon = Calendar.get_month(this.gMonth).toUpperCase();
		var vFMon = Calendar.get_month(this.gMonth);
        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 "MONTH DD, YYYY" :
                		vData = vFMon + " " + vDD + ", " + vY4;
                		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, p_callback) {
        var p_WinCal = ggWinCal;
        gCal = new Calendar(p_item, p_WinCal, p_month, p_year, p_format, p_callback);

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

        // Choose appropriate show function
        if (gCal.gYearly)       gCal.showY();
        else    gCal.show();
}

/* ******************************************************************************* */
/*
Monthly Calendar Code Starts here
*/
function show_calendar() {
	var mWidth = 250;
	var mHeight = 165;
	var mTop = (self.screen.height / 2) - (mHeight / 2);
	var mLeft = (self.screen.width / 2) - (mWidth / 2 );
	
        /* 
                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 = (typeof(arguments[1]) == "number") ? 
                			arguments[1].toString() 
                			: 
                			arguments[1];
        if (arguments[2] == "" || arguments[2] == null)
                p_year = new String(gNow.getFullYear().toString());
        else
                p_year = (typeof(arguments[2]) == "number") ? 
                			arguments[2].toString() 
                			: 
                			arguments[2];
        if (arguments[3] == null)
                p_format = "MM/DD/YYYY";
        else
                p_format = (typeof(arguments[3]) == "string") ? 
                			arguments[3] 
                			: 
                			"MM/DD/YYYY";
		if (arguments[4] == null)
                p_callback = "";
        else
                p_callback = (typeof(arguments[4]) == "string") ? 
                			'self.opener.window.' + arguments[4] 
                			: 
                			"";
							//height=200,width=200,screenX=600,left=600,screenY=600,top=600
        vWinCal = window.open("", "Calendar", "height=" + mHeight + ",width=" + mWidth + ",screenX=" + mLeft + ",left=" + mLeft + ",screenY=" + mTop + ",top=" + mTop + ",status=no,resizable=no");
        vWinCal.opener = self;
        ggWinCal = vWinCal;

        Build(p_item, p_month, p_year, p_format,p_callback);
}

/* ******************************************************************************* */
/*
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());
        else
        	p_year = (typeof(p_year) == "number") ?
        				p_year.toString()
        				:
        				p_year;

        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);
}
/* *********************************EOF********************************* */