viewport 개발 관련 url 뷰포트 관련 참고사항 http://cafe.naver.com/webappdev/35970 https://github.com/mjpress/mj.js.lib/blob/master/mj.viewport.js 화면방향전환 http://cafe.naver.com/jjcclim/58 IT/web개발 2013.06.26