สอบถามเรื่องการ Jquery UI Tab ตั้งให้ Cookie หมด อายุ หลังจาก 30 นาที ทีค่ะ

<script type="text/javascript" src="js/jquery.cookie.js"></script>
<script type="text/javascript">
	$(document).ready(function(){							   
		$('#tab').tabs({
			ajaxOptions: {
				error: function(xhr,index,status,anchor) {
					$(anchor.hash).text('load error');		
				}	
			},
			//event: 'mouseover',
			collapsible: true,
			cookie: {expires: 1}				   
		}).find('.ui-tabs-nav').sortable({axis: 'x'});															   
	});
</script>

jQuery.cookie = function (key, value, options) {

    // key and value given, set cookie...
    if (arguments.length > 1 && (value === null || typeof value !== "object")) {
        options = jQuery.extend({}, options);

        if (value === null) {
            options.expires = -1;
        }

        if (typeof options.expires === 'number') {
            var days = options.expires, t = options.expires = new Date();
            t.setDate(t.getDate() + days);
        }

        return (document.cookie = [
            encodeURIComponent(key), '=',
            options.raw ? String(value) : encodeURIComponent(String(value)),
            options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
            options.path ? '; path=' + options.path : '',
            options.domain ? '; domain=' + options.domain : '',
            options.secure ? '; secure' : ''
        ].join(''));
    }

    // key and possibly options given, get cookie...
    options = value || {};
    var result, decode = options.raw ? function (s) { return s; } : decodeURIComponent;
    return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
};