if (document.images){

var img1on = new Image();
img1on.src = "link/top_on.gif";
var img1off = new Image();
img1off.src = "link/top_off.gif";
					
var img2on = new Image();
img2on.src = "link/ap_on.gif";
var img2off = new Image();
img2off.src = "link/ap_off.gif";
										
var img3on = new Image();
img3on.src = "link/sekkei_on.gif";
var img3off = new Image();
img3off.src = "link/sekkei_off.gif";
					
var img4on = new Image();
img4on.src = "link/jug_on.gif";
var img4off = new Image();
img4off.src = "link/jug_off.gif";

var img5on = new Image();
img5on.src = "link/1_on.gif";
var img5off = new Image();
img5off.src = "link/1_off.gif";
					
var img6on = new Image();
img6on.src = "link/2_on.gif";
var img6off = new Image();
img6off.src = "link/2_off.gif";
										
var img7on = new Image();
img7on.src = "link/3_on.gif";
var img7off = new Image();
img7off.src = "link/3_off.gif";
					
var img8on = new Image();
img8on.src = "link/4_on.gif";
var img8off = new Image();
img8off.src = "link/4_off.gif";	

var img9on = new Image();
img9on.src = "link/5_on.gif";
var img9off = new Image();
img9off.src = "link/5_off.gif";
					
var img10on = new Image();
img10on.src = "link/6_on.gif";
var img10off = new Image();
img10off.src = "link/6_off.gif";
										
var img11on = new Image();
img11on.src = "link/7_on.gif";
var img11off = new Image();
img11off.src = "link/7_off.gif";
					
var img12on = new Image();
img12on.src = "link/8_on.gif";
var img12off = new Image();
img12off.src = "link/8_off.gif";	

var img13on = new Image();
img13on.src = "link/9_on.gif";
var img13off = new Image();
img13off.src = "link/9_off.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');
}
}