Datepicker restrict range

JQdatepickerrestrictedrange.js

<script>
  	$(document).ready(function(){  
		    $('#txtStartDate').datepicker({
		        dateFormat: 'dd/mm/yy',

		        onSelect: function(dateText, inst) {

			        var pieces = dateText.split('/');
			        $('#day').val(pieces[0]);
			        $('#month').val(pieces[1]);
			        $('#year').val(pieces[2]);

			        var date2 = $('#txtStartDate').datepicker('getDate', '+1d'); 
  					date2.setDate(date2.getDate()+15); 

			        $('#txtEndDate').datepicker({
				        dateFormat: 'dd/mm/yy',
				        minDate: $('#txtStartDate').datepicker('getDate'),
				        maxDate: date2,
				        onSelect: function(dateText, inst) {

					        var firstday = new Date($('#txtStartDate').val().split('/').reverse().join(','));
						    var lastday = new Date($('#txtEndDate').val().split('/').reverse().join(','));
						    $('#totaldays').val((lastday - firstday) / 86400000); 
					    }
				    });
			   
			    }
		    });
		});
</script>