https://www.city.fukushima.fukushima.jp/theme/base/js/jquery_cookie.js

1	/**
2	 * Cookie plugin
3	 *
4	 * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
5	 * Dual licensed under the MIT and GPL licenses:
6	 * http://www.opensource.org/licenses/mit-license.php
7	 * http://www.gnu.org/licenses/gpl.html
8	 *
9	 */
10
11	/**
12	 * Create a cookie with the given name and value and other optional parameters.
13	 *
14	 * @example $.cookie('the_cookie', 'the_value');
15	 * @desc Set the value of a cookie.
16	 * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
17	 * @desc Create a cookie with all available options.
18	 * @example $.cookie('the_cookie', 'the_value');
19	 * @desc Create a session cookie.
20	 * @example $.cookie('the_cookie', null);
21	 * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
22	 *       used when the cookie was set.
23	 *
24	 * @param String name The name of the cookie.
25	 * @param String value The value of the cookie.
26	 * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
27	 * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
28	 *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
29	 *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
30	 *                             when the the browser exits.
31	 * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
32	 * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
33	 * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
34	 *                        require a secure protocol (like HTTPS).
35	 * @type undefined
36	 *
37	 * @name $.cookie
38	 * @cat Plugins/Cookie
39	 * @author Klaus Hartl/[email protected]
40	 */
41
42	/**
43	 * Get the value of a cookie with the given name.
44	 *
45	 * @example $.cookie('the_cookie');
46	 * @desc Get the value of a cookie.
47	 *
48	 * @param String name The name of the cookie.
49	 * @return The value of the cookie.

50	 * @type String
51	 *
52	 * @name $.cookie
53	 * @cat Plugins/Cookie
54	 * @author Klaus Hartl/[email protected]
55	 */
56	jQuery.cookie = function(name, value, options) {
57	    if (typeof value != 'undefined') { // name and value given, set cookie
58	        options = options || {};
59	        if (value === null) {
60	            value = '';
61	            options.expires = -1;
62	        }
63	        var expires = '';
64	        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
65	            var date;
66	            if (typeof options.expires == 'number') {
67	                date = new Date();
68	                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
69	            } else {
70	                date = options.expires;
71	            }
72	            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
73	        }
74	        // CAUTION: Needed to parenthesize options.path and options.domain
75	        // in the following expressions, otherwise they evaluate to undefined
76	        // in the packed version for some reason...
77	        var path = options.path ? '; path=' + (options.path) : '';
78	        var domain = options.domain ? '; domain=' + (options.domain) : '';
79	        var secure = options.secure ? '; secure' : '';
80	        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
81	    } else { // only name given, get cookie
82	        var cookieValue = null;
83	        if (document.cookie && document.cookie != '') {
84	            var cookies = document.cookie.split(';');
85	            for (var i = 0; i < cookies.length; i++) {
86	                var cookie = jQuery.trim(cookies[i]);
87	                // Does this cookie string begin with the name we want?
88	                if (cookie.substring(0, name.length + 1) == (name + '=')) {
89	                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
90	                    break;
91	                }
92	            }
93	        }
94	        return cookieValue;
95	    }
96	};