$(function(){
     var bookedDays = ["2012-2-16","2012-2-24","2012-2-20","2012-2-25","2011-11-29","2011-11-29","2011-11-29","2011-11-30",];
//var bookedDays = ["2011-2-10","2011-2-12","2011-2-14",];

function assignCalendar(id){
$('<div class="calendar" />')
.insertAfter( $(id) )
.datepicker({
dateFormat: 'yy-mm-dd',
onSelect: function(dateStr) {
  window.location = "program.php?day="+dateStr;
  //alert('You chose ' + dateStr);
},
maxDate: '+1y',
altField: id,
beforeShowDay: isAvailable })
.prev().hide();
}

function isAvailable(date){
var dateAsString = date.getFullYear().toString() + "-" + (date.getMonth()+1).toString() + "-" + date.getDate();
var result = $.inArray( dateAsString, bookedDays ) ==-1 ? [false] : [true, "ui-state-hover"];
return result
}
assignCalendar('.naptar');
});