browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion); 
roll = 'false';

if (browser_name == "Netscape" && browser_version >= 3.0)
{
 	roll = "true";
}

else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 4.0)
{
 		roll = "true";
}

if (roll == "true")
	 {

		

		choiche5On = new Image();

		choiche5On.src="immagini/freccia.gif";

		choiche1Off = new Image();

		choiche1Off.src="immagini/Empty.gif";

	 }
	 

function 

showImg(img1,ref1)
{
 	if (roll == "true")
 	{
 		newRef1 = eval(ref1 + ".src");
 		document.images[img1].src = newRef1;
 	}
}

function hideImg(img1,ref1)
{
	if (roll == "true")
 	{
 		newRef1 = eval(ref1 + ".src");
 		document.images[img1].src = newRef1;
 	}
}