/*
   Play Time Toys, Inc
   Author: Tony Gianfransico
   Date:   Sept 30, 2009

   Filename:         calendar.css
  
   Function List:
   calendar(calendarDay)
      Creates the calendar table for the month specified in the
      calendarDay parameter. The current date is highlighted in 
      the table.

   writeCalTitle(calendarDay)
      Writes the title row in the calendar table

   writeDayTitle()
      Writes the weekday title rows in the calendar table

   daysInMonth(calendarDay)
      Returns the number of days in the month from calendarDay

   writeCalDays(calendarDay)
      Writes the daily rows in the calendar table, highlighting
      calendarDay

*/

function calendar(calendarDay) {
	if (calendarDay == null) calDate = new Date()
	else calDate = new Date(calendarDay);
	
	document.write("<table id='calendar_table'>");
	writeCalTitle(calDate);
	writeDayNames();
	writeCalDays(calDate);
	document.write("</table>");
}

function writeCalTitle(calendarDay) {
	var monthName = new Array("January", "February", "March", "April", "May",
	"June", "July", "August", "September", "October", "November", "December");
	
	var thisMonth = calendarDay.getMonth();
	var thisYear = calendarDay.getFullYear();
	
	document.write ("<tr>");
	document.write ("<th id='calendar_head' colspan='7'>");
	document.write (monthName[thisMonth]+" "+thisYear);
	document.write ("</th>");
	document.write ("</tr>");
}

function writeDayNames() {
	var dayName = new Array("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
	
	document.write ("<tr>");
	for (var i=0;i<dayName.length;i++) {
		document.write("<th class='calendar_weekdays'> "+dayName[i]+"</th>");
	}
	document.write("</tr>");
}

function daysInMonth(calendarDay) {
	var thisYear = calendarDay.getFullYear();
	var thisMonth = calendarDay.getMonth();
	var dayCount = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
	if (thisYear % 4 ==0) {
		if ((thisYear % 100 !=0) || (thisYear % 400 ==0)) {
			dayCount[1] = 29;  // this is a leap year
		}
	}		
	return dayCount[thisMonth];  // return the number of days in the month
}

function writeCalDays(calendarDay) {
var currentDay = calendarDay.getDate();

//determine the starting day of the week
	var dayCount = 1;
	var totalDays = daysInMonth(calendarDay);
	calendarDay.setDate(1);					//set the date to the 1st day of the month
	var weekDay = calendarDay.getDay(); 	//the day of the week of the 1st day
//write blank cells preceding the start day
	document.write ("<tr>");
	for (var i=0; i<weekDay; i++) {
		document.write("<td></td>");
	}
//write cells for each day of the month
	while (dayCount <= totalDays) {
	//write the table rows and cells
	if (weekDay == 0) document.write("<tr>");
		if(dayCount == currentDay) {
		//highlight the current day
		document.write("<td class = 'calendar_dates' id = 'calendar_today'>" +dayCount+ "</td>");
		} else {
		//display the day as usual
		document.write("<td class ='calendar_dates'>" +dayCount+ "</td>");
		}
	if (weekDay == 6) document.write("</tr>");
	//move to the next day
	dayCount++;
	calendarDay.setDate(dayCount);
	weekDay = calendarDay.getDay();
	}
	document.write ("</tr>");
}