if (document.images) 
{  
img01on = new Image ;img01off = new Image;  
img02on = new Image ;img02off = new Image;
img03on = new Image ;img03off = new Image;
img04on = new Image ;img04off = new Image;
img05on = new Image ;img05off = new Image;
  
img01on.src = "images/buttons/06o.gif";img01off.src = "images/buttons/06.gif"; 
img02on.src = "images/buttons/07o.gif";img02off.src = "images/buttons/07.gif";
img03on.src = "images/buttons/08o.gif";img03off.src = "images/buttons/08.gif"; 
img04on.src = "images/buttons/09o.gif";img04off.src = "images/buttons/09.gif"; 
img05on.src = "images/buttons/10o.gif";img05off.src = "images/buttons/10.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; } }