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frameObject.contentDocument

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<html>
  <frameset cols="50%,50%">
    <frame id="leftFrame" src="frame_cdoc.htm">
    <frame id="rightFrame" src="frame_a.htm">
  </frameset>
</html>

HTML Îĵµ "frame_cdoc.htm" ±»·ÅÈëµÚÒ»ÁУ¬¶ø HTML Îĵµ "frame_a.htm" ±»·ÅÈëµÚ¶þÁС£

ÏÂÃæÊÇ "frame_cdoc.htm" µÄÔ´´úÂ룺

<html>
<head>
<script type="text/javascript">
function showCDoc()
  {
  var x=parent.document.getElementById("leftFrame")
  alert(x.contentDocument.documentElement.tagName)
  }
</script>
</head>
<body>

<input type="button" onclick="showCDoc()"
value="Show content-document's first tag" />

</body>
</html>
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