function positionInfo(object) {

	var p_elm = object;

	this.getElementLeft = getElementLeft;
	function getElementLeft() {
		var x = 0;
		var elm;
		if (typeof (p_elm) == "object") {
			elm = p_elm;
		} else {
			elm = document.getElementById(p_elm);
		}
		while (elm != null) {
			x += elm.offsetLeft;
			elm = elm.offsetParent;
		}
		return parseInt(x);
	}

	this.getElementWidth = getElementWidth;
	function getElementWidth() {
		var elm;
		if (typeof (p_elm) == "object") {
			elm = p_elm;
		} else {
			elm = document.getElementById(p_elm);
		}
		return parseInt(elm.offsetWidth);
	}

	this.getElementRight = getElementRight;
	function getElementRight() {
		return getElementLeft(p_elm) + getElementWidth(p_elm);
	}

	this.getElementTop = getElementTop;
	function getElementTop() {
		var y = 0;
		var elm;
		if (typeof (p_elm) == "object") {
			elm = p_elm;
		} else {
			elm = document.getElementById(p_elm);
		}
		while (elm != null) {
			y += elm.offsetTop;
			elm = elm.offsetParent;
		}
		return parseInt(y);
	}

	this.getElementHeight = getElementHeight;
	function getElementHeight() {
		var elm;
		if (typeof (p_elm) == "object") {
			elm = p_elm;
		} else {
			elm = document.getElementById(p_elm);
		}
		return parseInt(elm.offsetHeight);
	}

	this.getElementBottom = getElementBottom;
	function getElementBottom() {
		return getElementTop(p_elm) + getElementHeight(p_elm);
	}
}

function CalendarControl() {

	var calendarId = 'CalendarControl';
	var currentYear = 0;
	var currentMonth = 0;
	var currentDay = 0;

	var selectedYear = 0;
	var selectedMonth = 0;
	var selectedDay = 0;

	var months = [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug',
			'Sep', 'Oct', 'Nov', 'Dec' ];
	var dateField = null;

	function getProperty(p_property) {
		var p_elm = calendarId;
		var elm = null;

		if (typeof (p_elm) == "object") {
			elm = p_elm;
		} else {
			elm = document.getElementById(p_elm);
		}
		if (elm != null) {
			if (elm.style) {
				elm = elm.style;
				if (elm[p_property]) {
					return elm[p_property];
				} else {
					return null;
				}
			} else {
				return null;
			}
		}
	}

	function setElementProperty(p_property, p_value, p_elmId) {
		var p_elm = p_elmId;
		var elm = null;

		if (typeof (p_elm) == "object") {
			elm = p_elm;
		} else {
			elm = document.getElementById(p_elm);
		}
		if ((elm != null) && (elm.style != null)) {
			elm = elm.style;
			elm[p_property] = p_value;
		}
	}

	function setProperty(p_property, p_value) {
		setElementProperty(p_property, p_value, calendarId);
	}

	function getDaysInMonth(year, month) {
		return [ 31,
				((!(year % 4) && ((year % 100) || !(year % 400))) ? 29 : 28),
				31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ][month - 1];
	}

	function getDayOfWeek(year, month, day) {
		var date = new Date(year, month - 1, day)
		return date.getDay();
	}

	this.clearDate = clearDate;
	function clearDate() {
		dateField.value = '';
		hide();
	}

	this.setDate = setDate;
	function setDate(year, month, day) {
		if (dateField) {
			if (month < 10) {
				month = "0" + month;
			}
			if (day < 10) {
				day = "0" + day;
			}

			var dateString = year + "-" + month + "-" + day;
			dateField.value = dateString;
			hide();
		}
		return;
	}

	this.changeMonth = changeMonth;
	function changeMonth(change) {
		currentMonth += change;
		currentDay = 0;
		if (currentMonth > 12) {
			currentMonth = 1;
			currentYear++;
		} else if (currentMonth < 1) {
			currentMonth = 12;
			currentYear--;
		}

		calendar = document.getElementById(calendarId);
		calendar.innerHTML = calendarDrawTable();
	}

	this.changeYear = changeYear;
	function changeYear(change) {
		currentYear += change;
		currentDay = 0;
		calendar = document.getElementById(calendarId);
		calendar.innerHTML = calendarDrawTable();
	}

	function getCurrentYear() {
		var year = new Date().getYear();
		if (year < 1900)
			year += 1900;
		return year;
	}

	function getCurrentMonth() {
		return new Date().getMonth() + 1;
	}

	function getCurrentDay() {
		return new Date().getDate();
	}

	function calendarDrawTable() {

		var dayOfMonth = 1;
		var validDay = 0;
		var startDayOfWeek = getDayOfWeek(currentYear, currentMonth, dayOfMonth);
		var daysInMonth = getDaysInMonth(currentYear, currentMonth);
		var css_class = null; // CSS class for each day

		var table = "<table cellspacing='0' cellpadding='0' border='0'>";
		table = table + "<tr class='header'>";
		table = table
				+ "  <td colspan='2' class='previous'><a href='javascript:changeCalendarControlMonth(-1);'>&lt;</a> <a href='javascript:changeCalendarControlYear(-1);'>&laquo;</a></td>";
		table = table + "  <td colspan='3' class='title'>"
				+ months[currentMonth - 1] + " " + currentYear + "</td>";
		table = table
				+ "  <td colspan='2' class='next'><a href='javascript:changeCalendarControlYear(1);'>&raquo;</a> <a href='javascript:changeCalendarControlMonth(1);'>&gt;</a></td>";
		table = table + "</tr>";
		table = table
				+ "<tr><th>S</th><th>M</th><th>T</th><th>W</th><th>T</th><th>F</th><th>S</th></tr>";

		for ( var week = 0; week < 6; week++) {
			table = table + "<tr>";
			for ( var dayOfWeek = 0; dayOfWeek < 7; dayOfWeek++) {
				if (week == 0 && startDayOfWeek == dayOfWeek) {
					validDay = 1;
				} else if (validDay == 1 && dayOfMonth > daysInMonth) {
					validDay = 0;
				}

				if (validDay) {
					if (dayOfMonth == selectedDay
							&& currentYear == selectedYear
							&& currentMonth == selectedMonth) {
						css_class = 'current';
					} else if (dayOfWeek == 0 || dayOfWeek == 6) {
						css_class = 'weekend';
					} else {
						css_class = 'weekday';
					}

					table = table + "<td><a class='" + css_class
							+ "' href=\"javascript:setCalendarControlDate("
							+ currentYear + "," + currentMonth + ","
							+ dayOfMonth + ")\">" + dayOfMonth + "</a></td>";
					dayOfMonth++;
				} else {
					table = table + "<td class='empty'>&nbsp;</td>";
				}
			}
			table = table + "</tr>";
		}

		table = table
				+ "<tr class='header'><th colspan='7' style='padding: 3px;'><a href='javascript:clearCalendarControl();'>Clear</a> | <a href='javascript:hideCalendarControl();'>Close</a></td></tr>";
		table = table + "</table>";

		return table;
	}

	this.show = show;
	function show(field) {
		can_hide = 0;

		// If the calendar is visible and associated with
		// this field do not do anything.
		if (dateField == field) {
			return;
		} else {
			dateField = field;
		}

		if (dateField) {
			try {
				var dateString = new String(dateField.value);
				var dateParts = dateString.split("-");
				selectedYear = parseInt(dateParts[0], 10);
				selectedMonth = parseInt(dateParts[1], 10);
				selectedDay = parseInt(dateParts[2], 10);

			} catch (e) {
			}
		}

		if (!(selectedYear && selectedMonth && selectedDay)) {
			selectedYear = getCurrentYear();
			selectedMonth = getCurrentMonth();
			selectedDay = getCurrentDay();
		}

		currentYear = selectedYear;
		currentMonth = selectedMonth;
		currentDay = selectedDay;

		if (document.getElementById) {

			calendar = document.getElementById(calendarId);
			calendar.innerHTML = calendarDrawTable(currentYear, currentMonth);

			setProperty('display', 'block');

			var fieldPos = new positionInfo(dateField);
			var calendarPos = new positionInfo(calendarId);

			var x = fieldPos.getElementLeft();
			var y = fieldPos.getElementBottom();

			setProperty('left', x - 80 + "px");
			setProperty('top', y - 21 + "px");

			if (document.all) {
				setElementProperty('display', 'block', 'CalendarControlIFrame');
				setElementProperty('left', x + "px", 'CalendarControlIFrame');
				setElementProperty('top', y + "px", 'CalendarControlIFrame');
				setElementProperty('width', calendarPos.getElementWidth()
						+ "px", 'CalendarControlIFrame');
				setElementProperty('height', calendarPos.getElementHeight()
						+ "px", 'CalendarControlIFrame');
			}
		}
	}

	this.hide = hide;
	function hide() {
		if (dateField) {
			setProperty('display', 'none');
			setElementProperty('display', 'none', 'CalendarControlIFrame');
			dateField = null;
		}
	}

	this.visible = visible;
	function visible() {
		return dateField
	}

	this.can_hide = can_hide;
	var can_hide = 0;
}

var calendarControl = new CalendarControl();

function showCalendarControl(textField) {
	// textField.onblur = hideCalendarControl;
	calendarControl.show(textField);
}

function clearCalendarControl() {
	calendarControl.clearDate();
}

function hideCalendarControl() {
	if (calendarControl.visible()) {
		calendarControl.hide();
	}
}

function setCalendarControlDate(year, month, day) {
	calendarControl.setDate(year, month, day);
}

function changeCalendarControlYear(change) {
	calendarControl.changeYear(change);
}

function changeCalendarControlMonth(change) {
	calendarControl.changeMonth(change);
}

document
		.write("<iframe id='CalendarControlIFrame' frameBorder='0' scrolling='no'></iframe>");
document.write("<div id='CalendarControl'></div>");