jqery selectbox 초기화

$("#kind > option[value='선택한값']").attr("selected","selected");

[참고]

http://danhobak-textcube.blogspot.kr/2010/09/select-%EA%B0%92-%EC%9C%A0%EC%A7%80%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95.html