// JavaScript Document
function selected(cal, date) {
  cal.sel.value = date; 
  cal.callCloseHandler();
}
function closeHandler(cal) {
  cal.hide();                        // hide the calendar
}
function showCalendar(id, format) {
  var el = document.getElementById(id);
  if (calendar != null) {
    calendar.hide();                 // so we hide it first.
  } else {
    var cal = new Calendar(false, null, selected, closeHandler);
    calendar = cal;                  // remember it in the global var
    cal.setRange(1900, 2070);        // min/max year allowed.
    cal.create();
  }
  calendar.setDateFormat(format);    // set the specified date format
  if(el.value==""){
   calendar.parseDate(el.value);      // try to parse the text in field
  }
  calendar.sel = el;                 // inform it what input field we use
  calendar.showAtElement(el);        // show the calendar below it

  return false;
}