// 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.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);
  
  var trigger = document.getElementById(id);
  
  if (document.getElementById('trigger_'+id)) { 
  	trigger = document.getElementById('trigger_'+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(el.nextSibling, "Br");        // show the calendar
	_dynarch_popupCalendar.showAtElement(trigger, "Br");
  return false;
}