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/dott_an.gif";
a2=new Image; a2.src="images/dott_an.gif";
a3=new Image; a3.src="images/dott_an.gif";
a4=new Image; a4.src="images/dott_an.gif";
a5=new Image; a5.src="images/dott_an.gif";
a6=new Image; a6.src="images/dott_an.gif";
}

function foto(name){
	screen_width=screen.width-10-492;
	screen_height=screen.availHeight-100;
	window.open(''+name+'','_blank','scrollbars=yes,width=550,height='+500+',top=0,left='+100+',resizable=no,toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no')
}