function switchRank(key) {
	if (key == 1) {
		onObj = 'rank_b1';
		offObj = 'rank_b2';
		onArea = 'rank1';
		offArea = 'rank2';
	} else if (key == 2) {
		onObj = 'rank_b2';
		offObj = 'rank_b1';
		onArea = 'rank2';
		offArea = 'rank1';
	}

	document.getElementById(onObj).className = 'select';
	document.getElementById(offObj).className = '';

	document.getElementById(onArea).style.display = 'block';
	document.getElementById(offArea).style.display = 'none';
}