var browserType = navigator.userAgent.toLowerCase();
if(browserType.indexOf('mozilla')){
document.write("Netscape Navigator");
}else if (browserType.indexOf('msie')){
document.write("Microsoft Internet Explorer");
}else if (browserType.indexOf('opera')){
document.write("Opera");
}else if (browserType.indexOf('webtv')){
document.write("Web TV");
}
document.close()