function showAnnai() {
	document.getElementById("annai-sub").style.visibility="visible";
	}
function shutAnnai() {
	document.getElementById("annai-sub").style.visibility="hidden";
	}

function showHyojun() {
	document.getElementById("hyojunka-sub").style.visibility="visible";
	}
function shutHyojun() {
	document.getElementById("hyojunka-sub").style.visibility="hidden";
	}

function showTokei() {
	document.getElementById("tokei-sub").style.visibility="visible";
	}
function shutTokei() {
	document.getElementById("tokei-sub").style.visibility="hidden";
	}
function showKankyo() {
	document.getElementById("kankyo-sub").style.visibility="visible";
	}
function shutKankyo() {
	document.getElementById("kankyo-sub").style.visibility="hidden";
	}
function showEvent() {
	document.getElementById("event-sub").style.visibility="visible";
	}
function shutEvent() {
	document.getElementById("event-sub").style.visibility="hidden";
	}