<!-- // 

browser_name = navigator.appName; 
browser_version = parseFloat(navigator.appVersion); 

if (browser_name == "Netscape" && browser_version >= 3.0) { roll = 'true'; } 
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { roll = 'true'; } 
else { roll = 'false'; } 

function load(location){ 
return image; 
} 

if (roll == 'true'){ 
tr=new Image(); 
tr.src="images/arr.gif";   
} 

function show(where){ 
if (roll == 'true'){ 
stored=where; 
storedLocation=document.images[where].src; 
document.images[where].src="images/arr.gif";    
} 

} 

function hide(){ 
if (roll == 'true') document.images[stored].src=storedLocation; 
}