/** 
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  */ 
  
 /** 
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/klaus.hartl@stilbuero.de 
40  */ 
  
 /** 
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/klaus.hartl@stilbuero.de 
55  */ 
 jQuery.cookie = function(name, value, options) { 
     if (typeof value != 'undefined') { // name and value given, set cookie 
         options = options || {}; 
         if (value === null) { 
             value = ''; 
            options = $.extend({}, options); // clone object since it's unexpected behavior if the expired property were changed 
             options.expires = -1; 
         } 
        var expires = ''; 
         if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) { 
            var date; 
             if (typeof options.expires == 'number') { 
                 date = new Date(); 
                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000)); 
             } else { 
                date = options.expires; 
             } 
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE 
         } 
         // NOTE Needed to parenthesize options.path and options.domain 
         // in the following expressions, otherwise they evaluate to undefined 
         // in the packed version for some reason... 
        var path = options.path ? '; path=' + (options.path) : ''; 
         var domain = options.domain ? '; domain=' + (options.domain) : ''; 
         var secure = options.secure ? '; secure' : ''; 
         document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join(''); 
    } else { // only name given, get cookie 
         var cookieValue = null; 
        if (document.cookie && document.cookie != '') { 
             var cookies = document.cookie.split(';'); 
            for (var i = 0; i < cookies.length; i++) { 
                 var cookie = jQuery.trim(cookies[i]); 
                 // Does this cookie string begin with the name we want? 
                 if (cookie.substring(0, name.length + 1) == (name + '=')) { 
                     cookieValue = decodeURIComponent(cookie.substring(name.length + 1)); 
                     break; 
                } 
             } 
        } 
         return cookieValue; 
     } 
 };