제이쿼리 $ 바꿔서 사용하기 신버젼 구버젼 안부딪히게 하는 방법

http://okjungsoo.tistory.com/entry/jQuery%EC%99%80-%EB%8B%A4%EB%A5%B8-%EB%9D%BC%EC%9D%B4%EB%B8%8C%EB%9F%AC%EB%A6%AC%EB%A5%BC-%ED%95%A8%EA%BB%98-%EC%82%AC%EC%9A%A9%ED%95%98%EA%B8%B0

http://www.w3schools.com/jquery/jquery_noconflict.asp

https://learn.jquery.com/using-jquery-core/avoid-conflicts-other-libraries/