new Image().src = "http://www.obata-kyousei.jp/photos/img/bt_out_on.gif";
	new Image().src = "http://www.obata-kyousei.jp/photos/img/bt_out_off.gif";
	new Image().src = "http://www.obata-kyousei.jp/photos/img/bt_in_on.gif";
	new Image().src = "http://www.obata-kyousei.jp/photos/img/bt_in_off.gif";
	new Image().src = "http://www.obata-kyousei.jp/photos/img/bt_etc_on.gif";
	new Image().src = "http://www.obata-kyousei.jp/photos/img/bt_etc_off.gif";


function tabphoto(x){
	var outon = "http://www.obata-kyousei.jp/photos/img/bt_out_on.gif";
	var outoff = "http://www.obata-kyousei.jp/photos/img/bt_out_off.gif";
	var inon = "http://www.obata-kyousei.jp/photos/img/bt_in_on.gif";
	var inoff = "http://www.obata-kyousei.jp/photos/img/bt_in_off.gif";
	var etcon = "http://www.obata-kyousei.jp/photos/img/bt_etc_on.gif";
	var etcoff = "http://www.obata-kyousei.jp/photos/img/bt_etc_off.gif";


	var obj1 = document.getElementById('out').style;
	var obj2 = document.getElementById('in').style;
	var obj3 = document.getElementById('etc').style;

	switch(x){
		case 1:
			document.btout.src=outon;
			document.btin.src=inoff;
			document.btetc.src=etcoff;
			obj1.display = "block";
			obj2.display = "none";
			obj3.display = "none";
			break;
		case 2:
			document.btout.src=outoff;
			document.btin.src=inon;
			document.btetc.src=etcoff;
			obj1.display = "none";
			obj2.display = "block";
			obj3.display = "none";
			break;
		case 3:
			document.btout.src=outoff;
			document.btin.src=inoff;
			document.btetc.src=etcon;
			obj1.display = "none";
			obj2.display = "none";
			obj3.display = "block";
			break;
	}
}