参考 https://www.cnblogs.com/karila/p/6677381.html 但运行有错
花时间改了一发：
document.title = '导航标题';

var iframe = document.createElement('iframe');

iframe.style.visibility = 'hidden';

iframe.style.width = '1px';

iframe.style.height = '1px';

iframe.onload = function () {

  setTimeout(function () {

    document.body.removeChild(iframe);

  }, 0);

};

document.body.appendChild(iframe);