if (document.images) { 

// 設定開始（使用する画像を設定してください） 

var img1on  = new Image(); 
img1on.src  = "images/s_st-on.gif"; // ポイント時の画像
var img1off = new Image();
img1off.src = "images/s_st-off.gif"; // 通常の画像

var img2on  = new Image(); 
img2on.src  = "images/s_cabag-on.gif"; 
var img2off = new Image();
img2off.src = "images/s_cabag-off.gif";

var img3on  = new Image(); 
img3on.src  = "images/s_kara-on.gif"; 
var img3off = new Image();
img3off.src = "images/s_kara-off.gif"; 

var img4on  = new Image(); 
img4on.src  = "images/s_grm-on.gif"; 
var img4off = new Image();
img4off.src = "images/s_grm-off.gif"; 

var img5on  = new Image(); 
img5on.src  = "images/s_ks-on.gif"; 
var img5off = new Image();
img5off.src = "images/s_ks-off.gif";

var img6on  = new Image(); 
img6on.src  = "images/s_sil-on.gif"; 
var img6off = new Image();
img6off.src = "images/s_sil-off.gif";

var img7on  = new Image(); 
img7on.src  = "images/s_kz-on.gif"; 
var img7off = new Image();
img7off.src = "images/s_kz-off.gif";


// 設定終了 


} 

// ポイント時の処理 
function on(name) { 

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

} 

// 放した時の処理 
function off(name) { 

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

}