div abhängig vom browser

[willie.de]

if(navigator.appName == "Microsoft Internet Explorer") {document.write='<div id="A">...</div>);
if(navigator.appName == "Netscape") {document.write='<div id="B">...</div>);
else {document.write='<div id="C">...</div>);

uuups! falsch kopiert! so gehts:
if () document.write("irgendwas");