// how reliable is this test?
	isIE = (document.all ? true : false);
	isDOM = (document.getElementById ? true : false);

   // Initialize arrays.
	var months = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
	var daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
	var displayMonth = new Date().getMonth();
	var displayYear = new Date().getFullYear();
	var displayDivName;
	var displayElement;

	function getDays(month, year) {
		// Test for leap year when February is selected.
		if (1 == month)
			return ((0 == year % 4) && (0 != (year % 100))) || (0 == year % 400) ? 29 : 28;
		else
			return daysInMonth[month];
		}

	function getToday() {
		// Generate today's date.
		this.now = new Date();
		this.year = this.now.getFullYear();
		this.month = this.now.getMonth();
		this.day = this.now.getDate();
		}

	// Start with a calendar for today.
	today = new getToday();
	
	function newCalendar(eltName,attachedElement) {
		if (attachedElement) {
			if (displayDivName && displayDivName != eltName) hideElement(displayDivName);
			displayElement = attachedElement;
			}
		displayDivName = eltName;
		today = new getToday();
		var parseYear = parseInt(displayYear + '');
		var newCal = new Date(parseYear,displayMonth,1);
		var day = -1;
		var startDayOfWeek = newCal.getDay();
		if ((today.year == newCal.getFullYear()) && (today.month == newCal.getMonth())) {
			day = today.day;
			}
		var intDaysInMonth = getDays(newCal.getMonth(), newCal.getFullYear());
		var daysGrid = makeDaysGrid(startDayOfWeek,day,intDaysInMonth,newCal,eltName)
		if (isIE) {
			var elt = document.all[eltName];
			elt.innerHTML = daysGrid;
			} 
		else if (isDOM) {
			var elt = document.getElementById(eltName);
			elt.innerHTML = daysGrid;
			} 
		else {
			var elt = document.layers[eltName].document;
			elt.open();
			elt.write(daysGrid);
			elt.close();
			}
		}

	function incMonth(delta,eltName) {
		displayMonth += delta;
		if (displayMonth >= 12) {
			displayMonth = 0;
			incYear(1,eltName);
			}
		else if (displayMonth <= -1) {
			displayMonth = 11;
			incYear(-1,eltName);
			} 
		else {
			newCalendar(eltName);
			}
		}
	
	function incYear(delta,eltName) {
		displayYear = parseInt(displayYear + '') + delta;
		newCalendar(eltName);
		}

	function makeDaysGrid(startDay,day,intDaysInMonth,newCal,eltName) {
		var daysGrid;
		var month = newCal.getMonth();
		var year = newCal.getFullYear();
		var isThisYear = (year == new Date().getFullYear());
		var isThisMonth = (day > -1)
		daysGrid = '<table border=1 cellspacing=0 cellpadding=2><tr><td bgcolor=#ffffff nowrap>';
		daysGrid += '<font face="courier new, courier" size=2>';
		daysGrid += '<a href="javascript:hideElement(\'' + eltName + '\')">x</a>';
		daysGrid += '&nbsp;&nbsp;';
		daysGrid += '<a href="javascript:incMonth(-1,\'' + eltName + '\')">&laquo; </a>';
	
		daysGrid += '<b>';
		if (isThisMonth) { daysGrid += '<font color=red>' + months[month] + '</font>'; }
		else { daysGrid += months[month]; }
		daysGrid += '</b>';
		
		daysGrid += '<a href="javascript:incMonth(1,\'' + eltName + '\')"> &raquo;</a>';
		daysGrid += '&nbsp;&nbsp;&nbsp;';
		daysGrid += '<a href="javascript:incYear(-1,\'' + eltName + '\')">&laquo; </a>';
		
		daysGrid += '<b>';
		if (isThisYear) { daysGrid += '<font color=red>' + year + '</font>'; }
		else { daysGrid += ''+year; }
		daysGrid += '</b>';
		
		daysGrid += '<a href="javascript:incYear(1,\'' + eltName + '\')"> &raquo;</a><br>';
		daysGrid += '&nbsp;Su Mo Tu We Th Fr Sa&nbsp;<br>&nbsp;';
		var dayOfMonthOfFirstSunday = (7 - startDay + 1);
		for (var intWeek = 0; intWeek < 6; intWeek++) {
			var dayOfMonth;
			for (var intDay = 0; intDay < 7; intDay++) {
				dayOfMonth = (intWeek * 7) + intDay + dayOfMonthOfFirstSunday - 7;
				if (dayOfMonth <= 0) {
					daysGrid += "&nbsp;&nbsp; ";
					}
				else if (dayOfMonth <= intDaysInMonth) {
		 			var color = "blue";
		 			if (day > 0 && day == dayOfMonth) color="red";
		 			daysGrid += '<a href="javascript:setDay(';
		 			daysGrid += dayOfMonth + ',\'' + eltName + '\')" '
		 			daysGrid += 'style="color:' + color + '">';
		 			var dayString = dayOfMonth + "</a> ";
		 			if (dayString.length == 6) dayString = '0' + dayString;
		 			daysGrid += dayString;
					}
		  	}
		  	if (dayOfMonth < intDaysInMonth) daysGrid += "<br>&nbsp;";
			}
		return daysGrid + "</td></tr></table>";
		}
	
	function setDay(day,eltName) {
		displayElement.value = day + "/" + (displayMonth + 1) + "/" + displayYear;
		hideElement(eltName);
		}