JS读写cookie以及中文乱码解决

var cookiename = document.cookie.split(";");

//写入cookie
function SetCookie(name, value) {
            var exp = new Date();
            exp.setTime(exp.getTime() + 6 * 24 * 60 * 60 * 1000); //6天过期
            document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
            return true;
        };
//读取cookie
function getCookie(name) {
            var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
            if (arr != null) return unescape(arr[2]); return null;
        };