if (document.images) {
top_off = new Image(65,25);
top_off.src = 'images/btn/enter.gif';
top_over = new Image(625,25);
top_over.src = 'images/btn/enter_over.gif';

top_off = new Image(155,21);
top_off.src = 'images/btn/top_off.gif';
top_over = new Image(155,21);
top_over.src = 'images/btn/top_on.gif';

map_off = new Image(155,21);
map_off.src = 'images/btn/map_off.gif';
map_over = new Image(155,21);
map_over.src = 'images/btn/map_on.gif';

gaiyou_off = new Image(155,21);
gaiyou_off.src = 'images/btn/gaiyou_off.gif';
gaiyou_over = new Image(155,21);
gaiyou_over.src = 'images/btn/gaiyou_on.gif';

siteplan_off = new Image(155,21);
siteplan_off.src = 'images/btn/siteplan_off.gif';
siteplan_over = new Image(155,21);
siteplan_over.src = 'images/btn/siteplan_on.gif';

floorplan_off = new Image(155,21);
floorplan_off.src = 'images/btn/floorplan_off.gif';
floorplan_over = new Image(155,21);
floorplan_over.src = 'images/btn/floorplan_on.gif';

contact_off = new Image(155,21);
contact_off.src = 'images/btn/contact_off.gif';
contact_over = new Image(155,21);
contact_over.src = 'images/btn/contact_on.gif';

kouji_off = new Image(155,21);
kouji_off.src = 'images/btn/kouji_off.gif';
kouji_over = new Image(155,21);
kouji_over.src = 'images/btn/kouji_on.gif';
}

function di(id,name) {
if (document.images) {
document.images[id].src=eval(name+".src");}
}