if (document.images) { 

var img6on = new Image();
img6on.src = "../images/header_map_history_on.gif";
var img6off = new Image();
img6off.src = "../images/header_map_history.gif";

var img7on = new Image();
img7on.src = "../images/header_map_variety_on.gif";
var img7off = new Image();
img7off.src = "../images/header_map_variety.gif";

var img8on = new Image();
img8on.src = "../images/header_map_now_on.gif";
var img8off = new Image();
img8off.src = "../images/header_map_now.gif";

var img9on = new Image();
img9on.src = "../images/header_map_rankei_on.gif";
var img9off = new Image();
img9off.src = "../images/header_map_rankei.gif";

var img10on = new Image();
img10on.src = "../images/header_map_brand_on.gif";
var img10off = new Image();
img10off.src = "../images/header_map_brand.gif";

var img11on = new Image();
img11on.src = "../images/header_map_a_d_on.gif";
var img11off = new Image();
img11off.src = "../images/header_map_a_d.gif";

var img12on = new Image();
img12on.src = "../../images/header_map_home_on.gif";
var img12off = new Image();
img12off.src = "../../images/header_map_home.gif";

var img13on = new Image();
img13on.src = "../../images/header_map_info_on.gif";
var img13off = new Image();
img13off.src = "../../images/header_map_info.gif";

var img14on = new Image();
img14on.src = "../images/header_map_oversea_on.gif";
var img14off = new Image();
img14off.src = "../images/header_map_oversea.gif";

var img15on = new Image();
img15on.src = "../images/header_map_column_on.gif";
var img15off = new Image();
img15off.src = "../images/header_map_column.gif";

var img16on = new Image();
img16on.src = "../images/header_map_talk_on.gif";
var img16off = new Image();
img16off.src = "../images/header_map_talk.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'); 
} 

}