if	( navigator.userAgent.toLowerCase().indexOf('msie') != -1)		
		{ document.write('<link rel="stylesheet" type="text/css" href="/styles_tnp_IE.css">'); }
else if (document.layers || (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 5))	
		{ document.write('<link rel="stylesheet" type="text/css" href="/styles_tnp_NS.css">'); }
else if (navigator.appVersion.indexOf("Mac") != -1)
		{ document.write('<link rel="stylesheet" type="text/css" href="/styles_tnp_MAC.css">'); }