document.referrer取得上一页的来源
he referrer property returns the URL of the document that loaded this document.The referrer of this document is: < type="text/javascript"> document.write(document.referrer)//document.referrer是上一页的来源
The referrer property returns the URL of the document that loaded this document. The referrer of this document is:<script type="text/javascript">document.write(document.referrer)//document.referrer是上一页的来源</script>
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