<iframe src="auto-refresh.html" width=500 height=500 rel="noreferrer"></iframe>
auto-refresh.html内容：
<span><</span><span>html</span><span>></span> <span><</span><span>head</span><span>></span> <span><</span><span>meta </span><span>name</span><span>="referrer"</span><span> content</span><span>="never"</span><span>></span> <span><</span><span>meta </span><span>http-equiv</span><span>="refresh"</span><span> content</span><span>="0;url=http://xxx.xxx.xxx"</span><span>></span> <span></</span><span>style</span><span>></span> <span></</span><span>head</span><span>></span> <span><</span><span>body</span><span>></</span><span>body</span><span>></span> <span></</span><span>html</span><span>></span>
可实现去掉referer信息。
