Help to understand date picker code

I have the following code that represents a company office hours. I am trying to understand the array of var sunday_hours = new Array(). When I try to change the variables in the array it doesn’t seem to update the office hours on the display. Can anyone help me understand this?

	function validateresult() {
		jQuery.post('',
		jQuery("#appointmentid").serialize(),
		function(responseText) {
			document.getElementById("formstatus").innerHTML=responseText;
			if(responseText.search('success')>-1){
				document.appointmentform.reset();
			}
		});
	}
	
	var sunday_hours = new Array(
		'10',
		'20',
		'',
		'',
		'on',
		'12'
	);

	var monday_hours = new Array(
		'11',
		'20',
		'15',
		'',
		'',
		'12'
	);

	var tuesday_hours = new Array(
		'11',
		'20',
		'15',
		'',
		'',
		'12'
	);

	var wednesday_hours = new Array(
		'11',
		'20',
		'15',
		'',
		'',
		'12'
	);

	var thursday_hours = new Array(
		'10',
		'20',
		'',
		'',
		'',
		'12'
	);

	var friday_hours = new Array(
		'10',
		'20',
		'',
		'',
		'',
		'12'
	);
	
	var saturday_hours = new Array(
		'',
		'',
		'',
		'',
		'',
		''
	);

	var calander_business_hours = new Array(monday_hours,tuesday_hours,wednesday_hours,thursday_hours,friday_hours,saturday_hours,sunday_hours);

	//get the working hours when selected any date on the calendar
	function onSelectCalendarDate(dateText, inst) {

		var date;
		if(dateText == '')
			date = new Date();
		else
			date = jQuery("#widgetdateselect").datepicker('getDate');

		var dayOfWeek = date.getUTCDay();	
		var applicable_hours = calander_business_hours[dayOfWeek];
		if(applicable_hours[1] == '')
			applicable_hours[1] ='0';
							
		if(applicable_hours[2] == '')
			applicable_hours[2] ='0';
						
		if(applicable_hours[3] == '')
			applicable_hours[3] ='0';
								
		var start_hours = parseInt(applicable_hours[0]);
		var close_hours = parseInt(applicable_hours[1]);
		var start_mins = parseInt(applicable_hours[2]);
		var close_mins = parseInt(applicable_hours[3]);
		var closed = applicable_hours[4];
		var format = applicable_hours[5];
		var options_str = ''; //stores options of the hours
		
		//handle 24 or 12 hours
		if(format == 24){
			//handle exceptional cases like close time more than midnight 12
			if(close_hours < start_hours)
				close_hours = 24;
			
			loop_index = 0;
			while(start_hours <= close_hours)  {
			
				start_hours = (start_hours < 10 ? '0' : '') + start_hours
				
				if(loop_index++ == 0) {
					if(start_mins == 0) options_str +='<option value="'+start_hours+':00">'+start_hours+':00</option>';
					if(start_mins <= 15) options_str +='<option value="'+start_hours+':15">'+start_hours+':15</option>';
					if(start_mins <= 30) options_str +='<option value="'+start_hours+':30">'+start_hours+':30</option>';
					if(start_mins <= 45) options_str +='<option value="'+start_hours+':45">'+start_hours+':45</option>';
					start_hours++;
					continue;
				}
				if(start_hours == close_hours) {
					if(close_mins > 0) options_str +='<option value="'+start_hours+':00">'+start_hours+':00</option>';
					if(close_mins > 15) options_str +='<option value="'+start_hours+':15">'+start_hours+':15</option>';
					if(close_mins > 30) options_str +='<option value="'+start_hours+':30">'+start_hours+':30</option>';
					
				} else {
					options_str +='<option value="'+start_hours+':00">'+start_hours+':00</option>';
					options_str +='<option value="'+start_hours+':15">'+start_hours+':15</option>';
					options_str +='<option value="'+start_hours+':30">'+start_hours+':30</option>';
					options_str +='<option value="'+start_hours+':45">'+start_hours+':45</option>';
				}
				
				start_hours++;
			
			}
		}
		else
		if(format == 12){

			//handle exceptional cases like close time more than midnight 12
			if(close_hours < start_hours)
				close_hours = 24;
			
			loop_index =0;
			while(start_hours <= close_hours)  {							
											
				am_or_pm = start_hours - 12 >= 0? 'PM':'AM';
				if(start_hours>12) {
					hours_label = start_hours - 12;
				}else{
					hours_label = start_hours
				}
				hours_label = (hours_label < 10 ? '0' : '') + hours_label;
				
				if(loop_index++ == 0) {
					if(start_mins == 0) options_str +='<option value="'+hours_label+':00'+am_or_pm+'">'+hours_label+':00'+am_or_pm+'</option>';
					if(start_mins <= 15) options_str +='<option value="'+hours_label+':15'+am_or_pm+'">'+hours_label+':15'+am_or_pm+'</option>';
					if(start_mins <= 30) options_str +='<option value="'+hours_label+':30'+am_or_pm+'">'+hours_label+':30'+am_or_pm+'</option>';
					if(start_mins <= 45) options_str +='<option value="'+hours_label+':45'+am_or_pm+'">'+hours_label+':45'+am_or_pm+'</option>';
					start_hours++;
					continue;
				}
				if(start_hours == close_hours) {
					if(close_mins > 0) options_str +='<option value="'+hours_label+':00'+am_or_pm+'">'+hours_label+':00'+am_or_pm+'</option>';
					if(close_mins > 15) options_str +='<option value="'+hours_label+':15'+am_or_pm+'">'+hours_label+':15'+am_or_pm+'</option>';
					if(close_mins > 30) options_str +='<option value="'+hours_label+':30'+am_or_pm+'">'+hours_label+':30'+am_or_pm+'</option>';
					
				} else {
					options_str +='<option value="'+hours_label+':00'+am_or_pm+'">'+hours_label+':00'+am_or_pm+'</option>';
					options_str +='<option value="'+hours_label+':15'+am_or_pm+'">'+hours_label+':15'+am_or_pm+'</option>';
					options_str +='<option value="'+hours_label+':30'+am_or_pm+'">'+hours_label+':30'+am_or_pm+'</option>';
					options_str +='<option value="'+hours_label+':45'+am_or_pm+'">'+hours_label+':45'+am_or_pm+'</option>';
				}
				
				
				start_hours++;
			}
		}

		jQuery('#appointmenttime').find('option').remove().end().append(options_str);
		jQuery("#appointmenttime").val('10:00AM');
		jQuery("#appointmenttime2").val('10:00AM');
		jQuery('#appointmenttime2').find('option').remove().end().append(options_str);
		if(closed=='on') {
			jQuery('#appointmenttime_para').hide();
			jQuery('#appointmenttime_closed_para').show();
		} else {
			jQuery('#appointmenttime_para').show();
			jQuery('#appointmenttime_closed_para').hide();
		}
	}

	jQuery(document).ready(function() {
		jQuery("#widgetdateselect").datepicker({
			dateFormat: "yy-mm-dd",
			minDate: 0,
			//dayNamesMin : [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ],
			//monthNames: [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ],
			firstDay:0,
			altField: "#dateselect",
			defaultDate: '2013-02-08',			onSelect: onSelectCalendarDate
		});
				onSelectCalendarDate('2013-02-08',jQuery("#widgetdateselect").datepicker());
				jQuery("#specialist").val('');
	});	

Hi,

I just scanned the code and I couldn’t see any obvious errors or reasons why this wouldn’t work.
If you can post a link to a page where I can see the error for myself, then I don’t mind taking a closer look.