원문 링크 : http://ask.xguru.net/1227/%EC%95%84%EC%9D%B4%ED%8F%B0%EC%9D%98-%EA%B0%80%EC%86%8D%EB%8F%84-%EC%84%BC%EC%84%9C%EB%A5%BC-javascript%EB%A1%9C-%EC%A0%9C%EC%96%B4%ED%95%98%EA%B8%B0
- DeviceOrientation
https://developer.apple.com/library/safari/#documentation/SafariDOMAdditions/Reference/DeviceOrientationEventClassRef/DeviceOrientationEvent/DeviceOrientationEvent.html
- DeviceMotion
https://developer.apple.com/library/safari/#documentation/SafariDOMAdditions/Reference/DeviceMotionEventClassRef/DeviceMotionEvent/DeviceMotionEvent.html
- API 표준
http://dev.w3.org/geo/api/spec-source-orientation.html
- 간단 예제
http://www.mobilexweb.com/blog/safari-ios-accelerometer-websockets-html5
HTML5 + WebSocket + Node.js 을 이용한 베틀 테트리스