// JScript File
function Calendar_OnCalendarViewChanged(calendarInstance, step)
{
      var dia = calendarInstance.GetSelectedDates();
      if ( calendar.RangeValidation.IsDateValid(calendar.CalculateDateFromStep(step)) )
      {
        calendar.NavigateToDate(calendar.CalculateDateFromStep(step));
      }
}

function CalendarDays_OnDateClick(calendarInstance, args)
{
    calendar.SelectDate(args.RenderDay.Date, false);
    document.getElementById(hiddenField).value = 1;
    var prm = Sys.WebForms.PageRequestManager.getInstance(); 
    prm._doPostBack('RadCalendarDays','');
}