设置网站动态标题

    var OriginTitile = document.title;
    var titleTime;
    document.addEventListener("visibilitychange", function () {
        if (document.hidden) {
            document.title = "你别走吖 Σ(っ °Д °;)っ";
            clearTimeout(titleTime);
        } else {
            document.title = "你可算回来了 (｡•ˇ‸ˇ•｡)";
            titleTime = setTimeout(function () {
                document.title = OriginTitile;
            }, 2000);
        }
    });

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