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Test Info:

<html>
<head>
<script>
try { frame = document.createElement('frame') } catch(e) { }
try { document.documentElement.appendChild(frame) } catch(e) { }
try { contentDocument = frame.contentDocument } catch(e) { }
try { contentDocument.writeln("<p contenteditable='true'>") } catch(e) { }
try { anotherDocument = document.implementation.createHTMLDocument(); } catch(e) { }
try { rootOfAnotherDocument = anotherDocument.documentElement; } catch(e) { }
try { document.replaceChild(rootOfAnotherDocument, document.documentElement); } catch(e) { }
</script>
</head>
</html>