function kontrolleraBrowser() {
	webLasare = navigator.appName;
	webLVersion = parseInt(navigator.appVersion);

	if (webLasare == "Netscape" && webLVersion >= 5) {
		alert("This website is optimized for\n Microsoft Internet Explorer 4 or later");
		return true;
	}
	else if (webLasare == "Microsoft Internet Explorer" && webLVersion >= 4) {
		return true;
	}
	else {
		alert("This website is optimized for\n Microsoft Internet Explorer 4 or later");
	}
}
	
kontrolleraBrowser();