if ((navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 3)
|| (parseInt(navigator.appVersion) >= 4))
        version = "ok";
        else version = "?";

if (version == "ok")
{
        var imgDir = "img/";

n0on = new Image();
n0on.src = imgDir + "btnHome_on.jpg";
n0off = new Image();
n0off.src = imgDir + "btnHome.jpg"; 

n1on = new Image();
n1on.src = imgDir + "btnComeArrivare_on.jpg";
n1off = new Image();
n1off.src = imgDir + "btnComeArrivare.jpg"; 

n2on = new Image();
n2on.src = imgDir + "btnParcheggi_on.jpg";
n2off = new Image();
n2off.src = imgDir + "btnParcheggi.jpg"; 





}

 function turnOn(img) {
   if (version == "ok")
	{
  	eval("document."+img).src = eval(img+"on").src;
	}
}

 function turnOff(img) {
   if (version == "ok")
	{
   	eval("document."+img).src = eval(img+"off").src;
	}
}