1. firstChild error
* 조치 : 개행문자 삭제
* 보기
<!-- IE8 -->
<body>
<table>
<!-- IE11 -->
<body><table>
ref.
https://msdn.microsoft.com/library/bg182625(v=vs.85).aspx
http://quirksmode.org/dom/core/
3. 32 bit 로 실행하기 (activeX 등 을 64 bit 에서 인식 못한다)
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
"TabProcGrowth"=dword:00000001
http://answers.microsoft.com/ko-kr/ie/forum/ie11-windows_7/%EC%9C%887-64%EB%B9%84%ED%8A%B8/53517b1d-d18d-4b27-bbc8-4bdb42f43eea?auth=1
4. iframe
IFRAMEOBJ.document.body.scrollHeight
-->
IFRAMEOBJ.contentWindow.document.body.scrollHeight