推荐订阅源

 1 jQuery.cookie = function(name, value, options) {   
 2     if (typeof value != 'undefined') { // name and value given, set cookie  
 3         options = options || {};  
 4         if (value === null) {  
 5             value = '';  
 6             options.expires = -1;  
 7         }  
 8         var expires = '';  
 9         if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {  
10             var date;  
11             if (typeof options.expires == 'number') {  
12                 date = new Date();  
13                 date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));  
14             } else {  
15                 date = options.expires;  
16             }  
17             expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE  
18         }  
19         // CAUTION: Needed to parenthesize options.path and options.domain  
20         // in the following expressions, otherwise they evaluate to undefined  
21         // in the packed version for some reason...  
22         var path = options.path ? '; path=' + (options.path) : '';  
23         var domain = options.domain ? '; domain=' + (options.domain) : '';  
24         var secure = options.secure ? '; secure' : '';    
25         document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');  
26     } else { // only name given, get cookie  
27         var cookieValue = null;  
28         if (document.cookie && document.cookie != '') {  
29             var cookies = document.cookie.split(';');  
30             for (var i = 0; i < cookies.length; i++) {  
31                 var cookie = jQuery.trim(cookies[i]);  
32                 // Does this cookie string begin with the name we want?  
33                 if (cookie.substring(0, name.length + 1) == (name + '=')) {  
34                     cookieValue = decodeURIComponent(cookie.substring(name.length + 1));  
35                     break;  
36                 }  
37             }  
38         }  
39         return cookieValue;  
40     }  
41 };