if (document.images) { 

//フッタリンク

var img1on = new Image();
img1on.src = "../images/btn_japanese02.gif"; 
var img1off = new Image();
img1off.src = "../images/btn_japanese01.gif";

var img2on = new Image();
img2on.src = "../images/btn_home02.gif";
var img2off = new Image();
img2off.src = "../images/btn_home01.gif";

var img3on = new Image();
img3on.src = "../images/btn_museum02.gif";
var img3off = new Image();
img3off.src = "../images/btn_museum01.gif";

var img4on = new Image();
img4on.src = "../images/btn_mail02.gif";
var img4off = new Image();
img4off.src = "../images/btn_mail01.gif";

var img5on = new Image();
img5on.src = "../images/btn_map02.gif";
var img5off = new Image();
img5off.src = "../images/btn_map01.gif";


//常設展示コーナー用館内案内
var img34on = new Image();
img34on.src = "../images/header_map_home2_on.gif";
var img34off = new Image();
img34off.src = "../images/header_map_home2.gif";


// コラムナビゲーション
var img35on = new Image();
img35on.src = "../images/column_content_sub01on.gif"; 
var img35off = new Image();
img35off.src = "../images/column_content_sub01.gif";

var img36on = new Image();
img36on.src = "../images/column_content_sub02on.gif"; 
var img36off = new Image();
img36off.src = "../images/column_content_sub02.gif";

var img37on = new Image();
img37on.src = "../images/column_content_sub03on.gif";
var img37off = new Image();
img37off.src = "../images/column_content_sub03.gif";


// 現在のマッチナビゲーション
var img53on = new Image();
img53on.src = "../images/now_navi01on.gif";
var img53off = new Image();
img53off.src = "../images/now_navi01.gif";

var img54on = new Image();
img54on.src = "../images/now_navi02on.gif";
var img54off = new Image();
img54off.src = "../images/now_navi02.gif";

} 


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'); 
} 

}