browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion);
 
if (browser_name == "Netscape" && browser_version >= 3.0) { browser_ok = 'true'; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { browser_ok = 'true'; }
else { browser_ok = 'false'; }
 
function change(img, ref) {
   if (browser_ok == 'true') {
       document.images[img].src = ref;
   }
}
 
if (browser_ok == 'true')
{
a1=new Image; a1.src="images/images-1-dark.gif";
a2=new Image; a2.src="images/images-2-dark.gif";
a3=new Image; a3.src="images/images-3-dark.gif";
a4=new Image; a3.src="images/images-4-dark.gif";
a5=new Image; a3.src="images/images-5-dark.gif";
a6=new Image; a3.src="images/images-6-dark.gif";
a7=new Image; a3.src="images/images-7-dark.gif";
a8=new Image; a3.src="images/images-8-dark.gif";
a9=new Image; a3.src="images/images-9-dark.gif";

}