C#存Cookie,JS取出为乱码

// 存的时候用Server.UrlEncode("中文")加密下
HttpCookie hc2 = new HttpCookie("LoginUserName", Server.UrlEncode(uc.UserName));
Response.SetCookie(hc1);

JS取出时在解密就不会有乱码了

decodeURIComponent("cookie");

var cookie =
{
    cookies: function (key, value, day, path, domain) {

        try {
            if (arguments.length >= 1) {
                var curCookie = document.cookie;
                var now = new Date();
                now.setDate(now.getDate() + day);
                if (arguments.length == 1) {
　　　　　　　　　　　  // 这里取出时解密 decodeURIComponent("cookie");
                    return decodeURIComponent(curCookie.match(new RegExp('(?=' + key + '=)[^;]*'))).split('=')[1];
                } else if (arguments.length == 2) {
                    curCookie = key + '=' + value;
                    return;
                } else if (arguments.length == 3) {
                    now.setDate(now.getDate() + day);
                    curCookie = key + '=' + encodeURIComponent(value) + ';expire=' + now.toGMTString();
                    return;
                } else if (arguments.length == 4) {
                    curCookie = key + '=' + encodeURIComponent(value) + ';expire=' + now.toGMTString() + ";path=" + path;
                    return;
                } else if (arguments.length == 5) {
                    curCookie = key + '=' + encodeURIComponent(value) + ';expire=' + now.toGMTString() + ";path=" + path + ";domain=" + domain;
                    return;
                }
            }
            alert("别乱来!");
        } catch (e) {
            alert(e.toString());
            return;
        }
    },
    remove: function (key) { this.cookies(key, 'null', -1) }
};