关于gg_bd_ad_720x90.js和follow.js

很多人对gg_bd_ad_720x90.js和follow.js 抱有疑问，这是个什么鬼?

我也迷惑了一阵子，今天偶然发现了这两个源文件。

大家一起欣赏下。

注意红色加粗代码。

1.follow.js

/*document.writeln("<div style=\"width:252px;margin:10px auto;\"><iframe width=\"250\" height=\"100\" class=\"share_self\"  frameborder=\"0\" scrolling=\"no\"")
document.writeln("src=\"http://widget.weibo.com/weiboshow/index.php?")
document.writeln("language=&width=250&height=100&fansRow=2&ptype=1&speed=0&skin=1&")
document.writeln("isTitle=0&noborder=1&isWeibo=0&isFans=0&uid=2832482174&verifier=d71718ca&dpc=1\"></iframe></div>")*/

2.gg_bd_ad_720x90.js

/*document.writeln('<div style="margin-left:420px"><div id="bdshare" class="bdshare_t bds_tools_32 get-codes-bdshare" style="margin:10px auto;">');
document.writeln('<a class="bds_tsina"></a>');
document.writeln('<a class="bds_tqq"></a>');
document.writeln('<a class="bds_renren"></a>');
document.writeln('<a class="bds_qzone"></a>');
document.writeln('<a class="bds_douban"></a>');
document.writeln('<a class="bds_xg"></a>');
document.writeln('<span class="bds_more">更多</span>');
document.writeln('<a class="shareCount"></a>');
document.writeln('</div></div>');
document.writeln('<script type="text/javascript" id="bdshare_js" data="type=tools" ></script>');
document.writeln('<script type="text/javascript" id="bdshell_js"></script>');
document.getElementById("bdshell_js").src = "http://bdimg.share.baidu.com/static/js/shell_v2.js?cdnversion=" + new Date().getHours();*/

//document.writeln('<div style="margin:10px auto"><b style="color:blue;font-size:16px">搜索源码</b>');
//document.writeln('<form action="http://www.google.com.hk" id="cse-search-box" target="_blank">');
//document.writeln('  <div>');
//document.writeln('    <input type="hidden" name="cx" value="partner-pub-0107013120141921:4097824525" />');
//document.writeln('    <input type="hidden" name="ie" value="UTF-8" />');
//document.writeln('    <input type="text" name="q" size="50" />');
//document.writeln('    <input type="submit" name="sa" value="搜索" />');
//document.writeln('  </div>');
//document.writeln('</form>');

//document.writeln('<script type="text/javascript" src="http://www.google.com.hk/coop/cse/brand?form=cse-search-box&amp;lang=zh-Hans"></script>');
//document.writeln('</div>');

document.writeln("<div style=\"width:728px;margin:10px auto;\"><script type=\"text/javascript\"><!--");
document.writeln("google_ad_client = \"ca-pub-0107013120141921\";");
document.writeln("/* demo页面横幅广告 */")
document.writeln("google_ad_slot = \"4192399144\";");
document.writeln("google_ad_width = 728;");
document.writeln("google_ad_height = 90;");
document.writeln("//-->");
document.writeln("</script>");
document.writeln("<script type=\"text/javascript\"");
document.writeln("src=\"http://pagead2.googlesyndication.com/pagead/show_ads.js\">");
document.writeln("</script></div>");

//document.writeln("<div style=\"width:728px;margin:10px auto;\">")
//document.writeln('<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>');
//document.writeln('<!-- demo页面横幅2 -->');
//document.writeln('<ins class="adsbygoogle"');
//document.writeln('     style="display:inline-block;width:728px;height:90px"');
//document.writeln('     data-ad-client="ca-pub-0107013120141921"');
//document.writeln('     data-ad-slot="4422996926"></ins>');
//document.writeln('<script>');
//document.writeln('(adsbygoogle = window.adsbygoogle || []).push({

});');
//document.writeln('</script>');
//document.writeln("</div>");

//document.writeln('<div style="width:336px;margin:5px auto;"><script type="text/javascript">');
//document.writeln('/*网页素材demo矩形*/');
//document.writeln('var cpro_id = "u1282812";');
//document.writeln('</script>');
//document.writeln('<script src="http://cpro.baidustatic.com/cpro/ui/c.js" type="text/javascript"></script></div>');

//document.writeln("<div align=\"center\"><p style=\"font-size:14px;\">==如非特殊说明，素材均转载自网络，如侵犯了你的知识产权，请邮件联系：tx_itivy@163.com，我们会尽快处理！==</p></div>");

document.write ('<div style="display:none"><script language="javascript" type="text/javascript" src="http://js.users.51.la/4473358.js"></script></div>');

document.writeln('<style type="text/css">.source-url{
font-size:15px;text-align:center
}</style>');

附上源码下载地址，有兴趣的话可以自己再看看

https://www.codeforge.cn/article/247759#introduction