if(document.images){

// トップページ
var img1on = new Image();
img1on.src = "images/index_01_02.gif"; // ポイント時の画像
var img1off = new Image();
img1off.src = "images/index_01.gif"; // 通常の画像

// 金麦のパン
var img2on = new Image();
img2on.src = "images/index_02_02.gif"; 
var img2off = new Image();
img2off.src = "images/index_02.gif"; 

// スタッフ紹介
var img3on = new Image();
img3on.src = "images/index_03_02.gif"; 
var img3off = new Image();
img3off.src = "images/index_03.gif"; 

// 金麦の一日
var img4on = new Image();
img4on.src = "images/index_04_02.gif"; 
var img4off = new Image();
img4off.src = "images/index_04.gif"; 

// お店の情報
var img5on = new Image();
img5on.src = "images/index_05_02.gif"; 
var img5off = new Image();
img5off.src = "images/index_05.gif"; 

// 設定終了 
}


function On(name) {

if (document.images) {
document.images[name].src = eval(name + 'on.src');
}

}

function Off(name) {

if (document.images) {
document.images[name].src = eval(name + 'off.src');
}

}