页面源中看似随机的Javascript

时间:2014-05-03 17:30:35

标签: javascript

我一直在查看谷歌提供的几个登录页面和应用程序的来源,当我通常向下滚动查看html的不同行时,我遇到了类似这样的内容:

这是什么意思?为什么用这种方式写的?

<script type="text/javascript">
  document.bg = new botguard.bg('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');
</script>

1 个答案:

答案 0 :(得分:0)

我认为这是针对机器人注册的某种安全措施。可能只允许启用JavaScript的客户使用注册/登录表单。

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