<script type="text/javascript">
var _bdhmProtocol = (("https:" == document.location.protocol) ? " https://" : " http://");
document.write(unescape("%3Cscript src='" + _bdhmProtocol + "hm.baidu.com/h.js%3F0dd64c3c686ec0e9dcf7911ab9189b2b' type='text/javascript'%3E%3C/script%3E"));
</script>
网页里有段这样的脚本,不知是什么用处?
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