browserName=navigator.appName;
browserVer=parseInt(navigator.appVersion);
version="n2";
if (browserName == "Netscape" && browserVer >= 3) version="n3";
if (browserName == "Microsoft Internet Explorer" && browserVer >= 4)
version="n3";

function addImg(url) {
	if (document.images) {
		sendback = new Image();
		sendback.src = url;
		return sendback;
	}
}

function swapImg(imgname,chwhere) {
	if (document.images) {
			eval("document."+imgname+".src = "+imgname+chwhere+".src;");
	}
}

if (version == "n3") {
if (document.images) {
	elsoon = addImg("img/1a2.jpg");
	elsooff = addImg("img/1a.jpg");
	masodikon = addImg("img/1b2.jpg");
	masodikoff = addImg("img/1b.jpg");
	harmadikon = addImg("img/1c2.jpg");
	harmadikoff = addImg("img/1c.jpg");
	negyedikon = addImg("img/1d2.jpg");
	negyedikoff = addImg("img/1d.jpg");
}
}