if (navigator.appName == "Microsoft Internet Explorer") 
{
	//IE
	document.write('<link rel="stylesheet" type="text/css" href="/layout/style2006_ie.css" />');
}
else if (navigator.appName == "Netscape")
{
	//Netscape
	document.write('<link rel="stylesheet" type="text/css" href="/layout/style2006_nc.css" />');
}