function archiveOpen() {
	if(document.getElementById('archives-change').innerHTML == '▼もっと見る') {
		document.getElementById('none').className = '';
		document.getElementById('archives-change').innerHTML = '▲閉じる';
	} else {
		document.getElementById('none').className = 'none';
		document.getElementById('archives-change').innerHTML = '▼もっと見る'; 
	}
}