//classの置換
function classChange() {
	if (document.getElementById("idTb")) {
		var		idJsTr_obj = document.getElementById("idTb");
		
		if( (idJsTr_obj.className == "Tb_box_more" ) || (idJsTr_obj.className == "Tb_box" )){
			if( idJsTr_obj.className == "Tb_box_more" ){
				idJsTr_obj.className = "Tb_box";
			}else {
				idJsTr_obj.className = "Tb_box_more";
			}
		} else {
			if( idJsTr_obj.className == "Tb_box_more" ){
				idJsTr_obj.className = "Tb_box";
			}else {
				idJsTr_obj.className = "Tb_box_more";
			}
		}
	}
}