function sel(kind){
	document.getElementById("set_expl").style.display = "none";
	document.getElementById("set_tradeS").style.display = "none";
	document.getElementById("set_tradeR").style.display = "none";
	document.getElementById("set_hyouka").style.display = "none";

	document.getElementById("set_" + kind).style.display = "block";

}