function setCookie(s){
	cName = "DPA=";
	exp = new Date();
	exp.setTime(exp.getTime() + 31536000000);
	document.cookie = cName + s + "; path=/" + "; expires=" + exp.toGMTString();
}

function getCookie(){
	zoom = "";
	cName = "DPA=";
	tmpCookie = document.cookie + ";";
	start = tmpCookie.indexOf(cName);
	if (start != -1)
	{
		end = tmpCookie.indexOf(";", start);
		zoom = tmpCookie.substring(start + cName.length, end);
		document.body.style.fontSize = zoom;
	} else {
		document.body.style.fontSize = "100%";
	}
}

function textSizeUp(){
	currentSize = document.body.style.fontSize;
	selectSize = "";
	if ( currentSize == "100%" ){
		selectSize = "120%";
	}
	else if ( currentSize == "120%" ){
		selectSize = "160%";
	}
	else if ( currentSize == "160%" ){
		selectSize = "180%";
	}
	else if ( currentSize == "180%" ){
		selectSize = "200%";
	}
	else if ( currentSize == "200%" ){
		m = escape("これ以上文字サイズを大きくはできません。");
		alert(unescape(m));
		selectSize = "200%";
	}
	else {
		selectSize = "100%";
	}
	document.body.style.fontSize = selectSize;
	
	if (typeof document.documentElement.style.maxHeight == "undefined") {
		var tds = document.getElementsByTagName("td");
		for(var i=0; i<tds.length; i++){
			tds[i].style.fontSize = selectSize;
		}
	}
	
	setCookie(selectSize);
}

function textSizeReset(){
	currentSize = document.body.style.fontSize;
	if ( currentSize =="100%") {
		m = escape("現在、文字サイズは標準です。");
	} else {
		m = escape("現在、文字サイズは" + currentSize + "です。標準に戻しますか？");
	}
	r = confirm(unescape(m));
	if (r) {
		currentSize = "100%";
		document.body.style.fontSize = currentSize;
		if (typeof document.documentElement.style.maxHeight == "undefined") {
			var tds = document.getElementsByTagName("td");
			for(var i=0; i<tds.length; i++){
				tds[i].style.fontSize = currentSize;
			}
		}
	}
	setCookie(currentSize);
}

try{
	window.addEventListener("load",getCookie,false);
}catch(e){
	window.attachEvent("onload",getCookie);
}