<!-- Original:  Kedar R. Bhave (softricks@hotmail.com) -->
<!-- Web Site:  http://www.softricks.com -->
var weekend = [0,6];
var weekendColor = "#e0e0e0";
var fontface = "Verdana";
var fontsize = 2;
var iAdvanceMonths;
var gNow = new Date();
var ggWinCal;
var strInputDay;
var strInputMonth;
var strInputYear;

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) {
   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.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;

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_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 WIDTH='100%' BORDER=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>Arrival date</title>");
   this.wwrite("</head>");

   this.wwrite("<body " +
      "link=\"" + this.gLinkColor + "\" " +
      "vlink=\"" + this.gLinkColor + "\" " +
      "alink=\"" + this.gLinkColor + "\" " +
      "text=\"" + this.gTextColor + "\">");
   this.wwriteA("<FONT FACE='" + fontface + "' SIZE=2><DIV ALIGN=center><B>");
   this.wwriteA("Choose an arrival date</B></DIV><BR>");

   this.wwriteA("<FONT FACE='" + fontface + "' SIZE=3><DIV ALIGN=center><B>");
   this.wwriteA(this.gMonthName + " " + this.gYear);
   this.wwriteA("</B></DIV><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("<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 + "', '" +
      this.gMonth + "', '" + (parseInt(this.gYear)-1) + "'" +
      ");" +
      "\"><-YR<\/A></TD><TD ALIGN=center>");
   this.wwrite("<A HREF=\"" +
      "javascript:window.opener.Build(" +
      "'" + this.gReturnItem + "', '" +
      prevMM + "', '" + prevYYYY + "'" +
      ");" +
      "\"><-Mon<\/A></TD><TD ALIGN=center>");
   this.wwrite("==</TD><TD ALIGN=center>");
   this.wwrite("<A HREF=\"" +
      "javascript:window.opener.Build(" +
      "'" + this.gReturnItem + "', '" +
      nextMM + "', '" + nextYYYY + "'" +
      ");" +
      "\">Mon-><\/A></TD><TD ALIGN=center>");
   this.wwrite("<A HREF=\"" +
      "javascript:window.opener.Build(" +
      "'" + this.gReturnItem + "', '" +
      this.gMonth + "', '" + (parseInt(this.gYear)+1) + "'" +
      ");" +
      "\">YR-><\/A></TD></TR></TABLE><BR>");

   // 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>Choose an arrival date</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 + "'" +
      ");" +
      "\" 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 + "'" +
      ");" +
      "\">>><\/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%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Sun</B></FONT></TD>";
   vCode = vCode + "<TD WIDTH='14%'><FONT SIZE='2' FACE='" + fontface + "' COLOR='" + this.gHeaderColor + "'><B>Mon</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>Wed</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>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>";
   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++) {
      var jDate = new Date();
      jDate.setDate(vDay);
      jDate.setMonth(this.gMonth);
      jDate.setFullYear(this.gYear);
      var kDate = new Date();
      kDate.setMonth(gNow.getMonth()+iAdvanceMonths-1);
      if ((jDate < gNow) || (jDate > kDate))
         vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" +
            this.format_day(vDay) +
            "</FONT></TD>";
      else
         vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" +
            "<A HREF='#' " +
               "onClick=\"self.opener." + this.gReturnItem + "(" +
                  this.gMonth + ", " + this.gYear + ", " + 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++) {
      var jDate = new Date();
      jDate.setDate(vDay);
      jDate.setMonth(this.gMonth);
      jDate.setFullYear(this.gYear);
      var kDate = new Date();
      kDate.setMonth(gNow.getMonth()+iAdvanceMonths-1);
      if ((jDate < gNow) || (jDate > kDate))
         vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" +
            this.format_day(vDay) +
            "</FONT></TD>";
      else
            vCode = vCode + "<TD WIDTH='14%'" + this.write_weekend_string(j) + "><FONT SIZE='2' FACE='" + fontface + "'>" +
               "<A HREF='#' " +
               "onClick=\"self.opener." + this.gReturnItem + "(" +
                  this.gMonth + ", " + this.gYear + ", " + 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>";
   }

   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>");

   if ((vday == strInputDay) && (this.gMonth.toString() == strInputMonth) && (this.gYear == strInputYear))
      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 "";
}

function Build(p_item, p_month, p_year) {
   var p_WinCal = ggWinCal;
   gCal = new Calendar(p_item, p_WinCal, p_month, p_year);

   // 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();
}

function show_calendar() {
   /*
      p_item   : Return Field.
      p_month  : 0-11 for Jan-Dec; 12 for All Months.
      p_year   : 4-digit year
      strInputDay : day
      iAdvanceMonths : Total months to book
   */

   p_item = arguments[0];
   if (arguments[1] == null)
      p_month = new String(gNow.getMonth());
   else
      p_month = new String(arguments[1]);
   if (arguments[2] == "" || arguments[2] == null)
      p_year = new String(gNow.getFullYear().toString());
   else
      p_year = new String(arguments[2]);

   strInputMonth = p_month;
   strInputYear = p_year;
   if (arguments[3] == "" || arguments[3] == null)
      strInputDay = gNow.getDate().toString();
   else
      strInputDay = new String(arguments[3]);
   if (arguments[4] == "" || arguments[4] == null)
      iAdvanceMonths = 12;
   else
      iAdvanceMonths = arguments[4];

   vWinCal = window.open("", "Calendar",
      "width=350,height=300,status=no,resizable=no,top=170,left=200");
   vWinCal.opener = self;
   ggWinCal = vWinCal;

   Build(p_item, p_month, p_year);
}
/*
Yearly Calendar Code Starts here
*/
function show_yearly_calendar(p_item, p_year) {
   // Load the defaults..
   if (p_year == null || p_year == "")
      p_year = new String(gNow.getFullYear().toString());

   var vWinCal = window.open("", "Calendar", "scrollbars=yes");
   vWinCal.opener = self;
   ggWinCal = vWinCal;

   Build(p_item, null, p_year);
}