if (document.images) 
{  
img01on = new Image ;img01off = new Image;  
img02on = new Image ;img02off = new Image;
img10on = new Image ;img10off = new Image;
img11on = new Image ;img11off = new Image;
img12on = new Image ;img12off = new Image;
img40on = new Image ;img40off = new Image;  
img41on = new Image ;img41off = new Image;
img50on = new Image ;img50off = new Image;
img51on = new Image ;img51off = new Image;
img52on = new Image ;img52off = new Image;



img01on.src = "images/buttons/01o.gif";img01off.src = "images/buttons/01.gif"; 
img02on.src = "images/buttons/02o.gif";img02off.src = "images/buttons/02.gif";
img10on.src = "images/buttons/10o.gif";img10off.src = "images/buttons/10.gif"; 
img11on.src = "images/buttons/11o.gif";img11off.src = "images/buttons/11.gif"; 
img12on.src = "images/buttons/12o.gif";img12off.src = "images/buttons/12.gif";

img40on.src = "images/buttons/40o.gif";img40off.src = "images/buttons/40.gif"; 
img41on.src = "images/buttons/41o.gif";img41off.src = "images/buttons/41.gif";
img50on.src = "images/buttons/50o.gif";img50off.src = "images/buttons/50.gif"; 
img51on.src = "images/buttons/51o.gif";img51off.src = "images/buttons/51.gif"; 
img52on.src = "images/buttons/52o.gif";img52off.src = "images/buttons/52.gif";


} 
function img_act(imgName) { 
if (document.images) 
{ imgOn = eval (imgName + "on.src"); 
document [imgName].src = imgOn; } } 
function img_inact(imgName) { 
if (document.images) 
{ imgOff = eval(imgName + "off.src"); 
document [imgName].src = imgOff; } }