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<!DOCTYPE html>

<html>

<head>

</head>

<body>

let baidu_spider_ua = "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)";

let google_spider_ua = "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)";

let not_spider_ua = "User-Agent, Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv,2.0.1) Gecko/20100101 Firefox/4.0.1";

let baidu_result = regexp.exec(baidu_spider_ua);

let google_result = regexp.exec(google_spider_ua);

let normal_result = regexp.exec(not_spider_ua);

document.write("baidu spider :" + baidu_result + "<br/>");

document.write("google spider :" + google_result + "<br/>");

document.write("not spider :" + normal_result + "<br/>");

</script>

</body>

</html>