var isNetscape = (navigator.appName.indexOf("Netscape") >= 0 && parseFloat(navigator.appVersion) >= 4) ? 1 : 0;

if ((navigator.appVersion.indexOf("Mac") != -1))
{	
	if (isNetscape) 
		document.write("<LINK REL=stylesheet HREF=\"/macns.css\" TYPE=\"text/css\">");
	else
		document.write("<LINK REL=stylesheet HREF=\"/mac.css\" TYPE=\"text/css\">");
}
else 
{	
	document.write("<LINK REL=stylesheet HREF=\"/win.css\" TYPE=\"text/css\">");
}