var a_on=new Image();
var a_off=new Image();
var b_on=new Image();
var b_off=new Image();
var c_on=new Image();
var c_off=new Image();
var d_on=new Image();
var d_off=new Image();
var e_on=new Image();
var e_off=new Image();
var f_on=new Image();
var f_off=new Image();
var g_on=new Image();
var g_off=new Image();
var h_on=new Image();
var h_off=new Image();
a_on.src="toppage/sitemap_over.gif";
a_off.src="toppage/sitemap.gif";
b_on.src="toppage/abo_over.gif";
b_off.src="toppage/abo.gif";
c_on.src="toppage/what_over.gif";
c_off.src="toppage/wha.gif";
d_on.src="toppage/gal_over.gif";
d_off.src="toppage/gal.gif";
e_on.src="toppage/pro_over.gif";
e_off.src="toppage/pro.gif";
f_on.src="toppage/male_over.gif";
f_off.src="toppage/male.gif";
g_on.src="toppage/bbs_over.gif";
g_off.src="toppage/bbs.gif";
h_on.src="toppage/workshop_over.gif";
h_off.src="toppage/workshop.gif";

function rollon(targetimage){
    if(targetimage=="image3"){
       document.images[targetimage].src=a_on.src; 
}else    if(targetimage=="image4"){
       document.images[targetimage].src=b_on.src;
}else    if(targetimage=="image5"){
       document.images[targetimage].src=c_on.src; 
}else       if(targetimage=="image6"){
       document.images[targetimage].src=d_on.src;
}else       if(targetimage=="image7"){
       document.images[targetimage].src=e_on.src;
}else       if(targetimage=="image8"){
       document.images[targetimage].src=g_on.src;
}else       if(targetimage=="image9"){
       document.images[targetimage].src=f_on.src;
}else       if(targetimage=="image0"){
       document.images[targetimage].src=h_on.src;
 }}

function rolloff(targetimage){
    if(targetimage=="image3"){
       document.images[targetimage].src=a_off.src; 
}else   if(targetimage=="image4"){
       document.images[targetimage].src=b_off.src;
}else   if(targetimage=="image5"){
       document.images[targetimage].src=c_off.src;
}else   if(targetimage=="image6"){
       document.images[targetimage].src=d_off.src;
}else   if(targetimage=="image7"){
       document.images[targetimage].src=e_off.src;
}else   if(targetimage=="image8"){
       document.images[targetimage].src=g_off.src;
}else   if(targetimage=="image9"){
       document.images[targetimage].src=f_off.src;
}else   if(targetimage=="image0"){
       document.images[targetimage].src=h_off.src;
 }}