var Zeile, CSSFile;

if ((navigator.appName == "Microsoft Internet Explorer")&&(parseInt(navigator.appVersion.charAt(0))>=4))
{
CSSFile="css/ie.css";
}

if ((navigator.appName=="Netscape")&&(parseInt(navigator.appVersion.charAt(0))>=4))
{
CSSFile="css/nn.css";
}


Zeile="<link rel=\"stylesheet\" href=\""+CSSFile+"\" type=\"text/css\">";
document.write(Zeile);