function disposeCalendar(calendarId) 
{
	Array.remove(eWorld_UI_CalendarPopups, calendarId);
	//the arrays below get regenerated dynamically on every asynch postback so can be set to undefined to free up memory
	eWorld_CalendarPopup_Calendars = undefined;
	eWorld_CalendarPopup_SpecialDays = undefined;
	eWorld_CalendarPopup_Styles = undefined;
}