var opera=false; var mac=false; var mac_ie4=false; var IE4=false; var NN4=false; var NN6=false;
var browserName = navigator.appName;
var browserVersion = parseFloat(navigator.appVersion); 

if (navigator.userAgent && (navigator.userAgent.indexOf("Mac") >= 0) && (browserName == "Microsoft Internet Explorer") && (browserVersion >= 4.0) && (navigator.appVersion.indexOf('MSIE 4') != -1))
	mac_ie4=true;
if (navigator.userAgent && (navigator.userAgent.indexOf("Mac") >= 0))
	mac=true;
if (navigator.userAgent && (navigator.userAgent.indexOf("Opera") >= 0))
	opera=true;

if (document.all)
	IE4=true;
else if (document.layers)
	{NN4=true;}
else if (document.getElementById)
	NN6=true;
	
//if (top == self) top.location.href='index.html';


function changeImage(name, adress)
{
	if (document.images)
		document.images[name].src=adress;
}