// 保存 Cookiefunction setCookie(name, value) {    expires = new Date();    expires.setTime(expires.getTime() + (1000 * 86400 * 365));    document.cookie = name + "=" + escape(value) + ";";}// 获取 Cookiefunction getCookie(name) {    cookie_name = name + "=";    cookie_length = document.cookie.length;    cookie_begin = 0;    while (cookie_begin < cookie_length) {        value_begin = cookie_begin + cookie_name.length;        if (document.cookie.substring(cookie_begin, value_begin) == cookie_name) {            var value_end = document.cookie.indexOf(";", value_begin);            if (value_end == -1) {                value_end = cookie_length;            }            return unescape(document.cookie.substring(value_begin, value_end));        }        cookie_begin = document.cookie.indexOf(" ", cookie_begin) + 1;        if (cookie_begin == 0) {            break;        }    }    return null;}// 清除 Cookiefunction delCookie(name) {    var expireNow = new Date();    document.cookie = name + "=" + "; expires="+expireNow+"" + "; path=/";}