function discstyle_change(x) {

		if(x == "1"){
			document.getElementById('disc_persons').style.height='auto';
			document.getElementById('disc_persons_navi').innerHTML='';
		} else if(x == "2"){
			document.getElementById('disc_artist').style.height='auto';
			document.getElementById('disc_artist_navi').innerHTML='';
		} else if(x == "3"){
			document.getElementById('disc_affdisc').style.height='auto';
			document.getElementById('disc_affdisc_navi').innerHTML='';
		}
	}