function ShowCalendar(input)
{
	var input_field = document.getElementById(input);

	var calendar = new Calendar(1, input_field.value, onSelect, onClose);
	
	calendar.InputFieldName = input_field;
	calendar.setDateFormat("%d/%m/%Y");
	calendar.create();
	calendar.parseDate(input_field.value);
	calendar.showAtElement(input_field, 'Bl');
}

function onSelect(calendar, date) {
  var input_field = calendar.InputFieldName;
  input_field.value = date;
  if (calendar.dateClicked) {
    calendar.callCloseHandler(); // this calls "onClose" (see above)
  }
};

function onClose(calendar) 
{
	calendar.hide();
	calendar.destroy();
};