아이프레임을 크기에 맞게 호출하는 스크립트
/*! iFrame Resizer (iframeSizer.contentWindow.min.js) - v3.6.5 - 2019-02-03
* Desc: Include this file in any page being loaded into an iframe
* to force the iframe to resize to the content size.
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* Copyright: (c) 2019 David J. Bradshaw - dave@bradshaw.net
* License: MIT
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