cal.setDisabledWeekDays(0,1,2,3,4,5,6);

cal.addEnabledDates("2009-10-01","2009-11-08");
 cal.addEnabledDates("2010-03-31","2010-04-06");
 cal.addEnabledDates("2010-04-29","2010-11-07");