// -- クッキー情報をセット -- //
function setCookie(s){
	cName = "Iyashinoie=";
	exp = new Date();
	exp.setTime(exp.getTime() + 31536000000);
	document.cookie = cName + s + "; path=/" + "; expires=" + exp.toGMTString();
}

// -- クッキー情報を入手 -- //
function getCookie(){
	zoom = "";
	cName = "Iyashinoie=";
	tmpCookie = document.cookie + ";";
	start = tmpCookie.indexOf(cName);
	if (start != -1)
	{
		end = tmpCookie.indexOf(";", start);
		zoom = tmpCookie.substring(start + cName.length, end);
		document.getElementById("contentsPanel").style.fontSize = zoom;
	} else {
		document.getElementById("contentsPanel").style.fontSize = "100%";
	}
}

// -- テキストサイズ変更 -- //
function textSizeUp(){
	currentSize = document.getElementById("contentsPanel").style.fontSize;
	selectSize = "";
	if ( currentSize == "100%" ){
		selectSize = "14pt";
	}
	else if ( currentSize == "14pt" ){
		selectSize = "18pt";
	}
	else if ( currentSize == "18pt" ){
		selectSize = "21pt";
	}
	else if ( currentSize == "21pt" ){
		selectSize = "24pt";
	}
	else if ( currentSize == "24pt" ){
		m = escape("これ以上大きくできません。");
		alert(unescape(m));
		selectSize = "24pt";
	}
	else {
		selectSize = "100%";
	}
	document.getElementById("contentsPanel").style.fontSize = selectSize;
	setCookie(selectSize);
}

function textSizeReset(){
	currentSize = document.getElementById("contentsPanel").style.fontSize;
	m = escape("標準のサイズに戻しますか？");
	r = confirm(unescape(m));
	if (r) {
		currentSize = "100%";
		document.getElementById("contentsPanel").style.fontSize = currentSize;
	}
	setCookie(currentSize);
}