Answers for "iframe in fullscreen"

html iframe full page

<iframe src="mypage.html" style="border: 0; width: 100%; height: 100%">Your browser doesn't support iFrames.</iframe>

Full Screen Iframe

<iframe src="mypage.html" style="position:fixed; top:0; left:0; bottom:0; right:0; width:100%; height:100%; border:none; margin:0; padding:0; overflow:hidden; z-index:999999;">
    Your browser doesn't support iframes
</iframe>