<!--롤오버용 스크립트-->
function board(OBJ) {
	if (OBJ == "1") {   
		board1.style.display = "";
		board2.style.display = "none";
	}
	else if(OBJ == "2") {   
		board1.style.display = "none";
		board2.style.display = "";
	}
}