browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
var agent = navigator.userAgent;
document.writeln("<link rel=stylesheet type=text/css href=\"/common/css/ie.css\">");
if (agent.indexOf("Opera") > -1) document.writeln("<link rel=stylesheet type=text/css href=\"/common/css/opera.css\">");
else 
if ((browserVer >3) &&(browserName == "Netscape")) 	document.writeln("<link rel=stylesheet type=text/css href=\"/common/css/nn.css\">");