js 操作 cookies 学习

文章摘自 http://www.quirksmode.org/js/cookies.html

 1         function createCookie(name, value, days) {
 2             if (days) {
 3                 var date = new Date();
 4                 date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
 5                 var expires = "; expires=" + date.toGMTString();
 6             }
 7             else var expires = "";
 8             document.cookie = name + "=" + value + expires + "; path=/";
 9         }
10         function readCookie(name) {
11             var nameEQ = name + "=";
12             var ca = document.cookie.split(';');
13             for (var i = 0; i < ca.length; i++) {
14                 var c = ca[i];
15                 while (c.charAt(0) == ' ') c = c.substring(1, c.length);
16                 if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
17             }
18             return null;
19         }
20         function eraseCookie(name) {
21             createCookie(name, "", -1);
22         }

转载于:https://www.cnblogs.com/shrimp-liao/archive/2012/08/17/2644122.html