function newImage(arg) {

if (document.images) {

rslt = new Image();

rslt.src = arg;

return rslt;}}

if (document.images) {

n_bh = newImage("i/n_bh.gif");}

function sh_item(where) {

if (document.images) {

storedLocation=where;

document.images["n"+where].src="i/n_bh.gif"; }}

function hd_item() {

if (document.images) {

where=storedLocation;

document.images["n"+where].src="i/n_b.gif"; }}