document.write('<script type="text/javascript" src="js/calendar/calendar.js"></script>');
document.write('<script type="text/javascript" src="js/calendar/lang/calendar-en.js"></script>');
document.write('<script type="text/javascript" src="js/calendar/calendar-setup.js"></script>');

Event.observe( window, 'load', function(){
	Calendar.setup({ ifFormat: df, inputField:"iddate_from", button:"btn_date_from" });
	Calendar.setup({ ifFormat: df, inputField:"iddate_to", button:"btn_date_to" });
} );