cookie的使用

 1 function Cookie() {};
 2     Cookie.prototype = {
 3         constructor: Cookie,
 4         _path: "/",
 5         expire: new Date(),
 6         setPath: function(path) {
 7             this._path = !path ? this._path : path;
 8         },
 9         getPath: function() {
10             return this._path;
11         },
12         set: function(name, value, day) {
13             if (this.get(name)) this.del(name);
14             day = day ? day : 0;
15             this.expire.setTime(this.expire.getTime() + day * 24 * 3600 * 1000);
16             document.cookie = name + "=" + escape(value) + (day != 0 ? ";expires=" + this.expire.toGMTString() : "") + ";path=" + this.getPath();
17         },
18         get: function(name) {
19             var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
20             if (arr != null) {
21                 return unescape(arr[2]);
22             }
23         },
24         del: function(name) {
25             if (this.get(name)) {
26                 document.cookie = name + "=" + "; expires=Thu, 01-Jan-70 00:00:01 GMT;path=" + this.getPath();
27             }
28         },
29         delAll: function() {
30             var arr = document.cookie.match(/[^ =;]+(?==)/g);
31             if (arr) {
32                 for (var i = arr.length; i--;) {
33                     this.del(arr[i]);
34                 }
35             }
36         }
37     };
38     var cookie = new Cookie();
39     cookie.set('flag', 'audit');