var oldLink = null;
	// This function gets called when the end-user clicks on some date.
	function selected(cal, date) {
	  cal.sel.value = date; // just update the date in the input field.
	  if (cal.dateClicked && (cal.sel.id == "sel4" || cal.sel.id == "sel3"))
		// if we add this call we close the calendar on single-click.
		// just to exemplify both cases, we are using this only for the 1st
		// and the 3rd field, while 2nd and 4th will still require double-click.
		cal.callCloseHandler();
	}


	// And this gets called when the end-user clicks on the _selected_ date,
	// or clicks on the "Close" button.  It just hides the calendar without
	// destroying it.
	function closeHandler(cal) {
	  cal.hide();                        // hide the calendar
	//  cal.destroy();
	  _dynarch_popupCalendar = null;
	}

	// This function shows the calendar under the element having the given id.
	// It takes care of catching "mousedown" signals on document and hiding the
	// calendar if the click was outside.
	function showCalendar(id, format, showsTime, showsOtherMonths) {
	  var el = document.getElementById(id);
	  if (_dynarch_popupCalendar != null) {
		// we already have some calendar created
		_dynarch_popupCalendar.hide();                 // so we hide it first.
	  } else {
		// first-time call, create the calendar.
		var cal = new Calendar(1, null, selected, closeHandler);
		// uncomment the following line to hide the week numbers
		// cal.weekNumbers = false;
		if (typeof showsTime == "string") {
		  cal.showsTime = true;
		  cal.time24 = (showsTime == "24");
		}
		if (showsOtherMonths) {
		  cal.showsOtherMonths = true;
		}
		_dynarch_popupCalendar = cal;                  // remember it in the global var
		cal.setRange(1900, 2070);        // min/max year allowed.
		cal.create();
	  }
	  _dynarch_popupCalendar.setDateFormat(format);    // set the specified date format
	  _dynarch_popupCalendar.parseDate(el.value);      // try to parse the text in field
	  _dynarch_popupCalendar.sel = el;                 // inform it what input field we use

	  // the reference element that we pass to showAtElement is the button that
	  // triggers the calendar.  In this example we align the calendar bottom-right
	  // to the button.
	  _dynarch_popupCalendar.showAtElement(document.getElementById("sel3"), "Br");        // show the calendar

	  return false;
	}