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How to get the source after executing javascript

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I'm trying to get the HTML code after executing javascript in IE. Here is my code.

$url = "http://example.com"
$oIE = _IECreate($url)
Sleep(3000) ;waiting for executing javascript. But useless.
$oFrame = _IEFrameGetCollection($oIE, 0)
$sCode &= _IEPropertyGet($oFrame, "innerhtml") & @CRLF

Then, I get this error.

"C:\Program Files (x86)\AutoIt3\Include\IE.au3" (2308) : ==> The requested action with this object has failed.:
$oTemp = $oObject.document.body
$oTemp = $oObject^ ERROR

After executing javascript, when I view source in IE, there are HTML code like below.


What should I do?

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