//イメージの先読み
function Imges()
{
if(document.images)
{
button01on=new Image();
button01on.src="./images/18ijyou++.gif";
button02on=new Image();
button02on.src="./images/18miman++.gif";


button01off=new Image();
button01off.src="./images/18ijyou+.gif";
button02off=new Image();
button02off.src="./images/18miman+.gif";
}
}

//オン、オフ時の動き：ヘッダ用
function on(imgName){
if(document.images)
{
	if(navigator.appName=="Microsoft Internet Explorer")
		{
		onImage=eval(imgName+"off.src");
		document[imgName].src=onImage;
		}
	else
		{
		onImage=eval(imgName+"off.src");
		document.Layer1.document[imgName].src=onImage;
		}
	}
}

function off(imgName){
if(document.images)
{
	if(navigator.appName=="Microsoft Internet Explorer")
		{
		offImage=eval(imgName+"on.src");
		document[imgName].src=offImage;
		}
	else
		{
		offImage=eval(imgName+"on.src");
		document.Layer1.document[imgName].src=offImage;
		}
	}
}

//オン、オフ時の動き：フッタ用
function onn(imgName){
var koido=imgName+"a";
if(document.images)
	{
		onImage=eval(imgName+"off.src");
		document[koido].src=onImage;
	}
}

function offf(imgName){
var koido=imgName+"a";
if(document.images)
	{
		offImage=eval(imgName+"on.src");
		document[koido].src=offImage;
	}
}

Imges();