function GetNavigator() {
	nagent = navigator.userAgent;
	nname = navigator.appName;
	nversion = navigator.appVersion;
	
	if (nagent.indexOf("Mac") != -1 && nname == "Netscape") {
		//Netscape per MAC
		browser = "NsMac";
	} else if (nagent.indexOf("Mac") != -1 && nname == "Microsoft Internet Explorer") {
		//IE per mac
		browser = "IeMac";
	} else if (nname == "Microsoft Internet Explorer" && nversion.indexOf("6.") != - 1) {
		//Internet explorer x pc V 6
		browser = "Ie6";
	} else if (nname == "Microsoft Internet Explorer" && nversion.indexOf("5.") != - 1) {
		//Internet explorer x pc V 5
		browser = "Ie5";
	} else if (nname == "Microsoft Internet Explorer" && nversion.indexOf("4.") != - 1) {
		//Internet explorer x pc V 4
		browser = "Ie4";
	} else if (nname == "Netscape" && nversion.indexOf("4.") != - 1) {
		//Netscape navigator x pc V 4
		browser = "Ns4";
	} else if (nname == "Netscape" && nversion.indexOf("5.") != - 1) {
		//Netscape navigator x pc V 5 (chiamata comunemente 6)
		browser = "Ns6";
	} else {
		//Se non sappiamo cosa sia...
		browser = "Ns4";
	}
	
	return browser;
}

var browser = GetNavigator();
//alert(browser);
switch (browser){
	case "NsMac" :
		document.write('<LINK HREF="/nuovo/style_mac_ntsc.css" REL="stylesheet" TYPE="text/css">');
		break;
	case "IeMac" :
		document.write('<LINK HREF="/nuovo/style_mac_ie.css" REL="stylesheet" TYPE="text/css">');
		break;
	case "Ie6" :
		document.write ('<LINK HREF="/nuovo/style_msie5.css" REL="stylesheet" TYPE="text/css">');
		break;
	case "Ie5" :
		document.write ('<LINK HREF="/nuovo/style_msie5.css" REL="stylesheet" TYPE="text/css">');
		break;
	case "Ie4" :
		document.write ('<LINK HREF="/nuovo/style_msie4.css" REL="stylesheet" TYPE="text/css">');
		break;
	case "Ns4" :
		document.write ('<LINK HREF="/nuovo/style_ntsc4.css" REL="stylesheet" TYPE="text/css">');
		break;
	case "Ns6" :
		document.write ('<LINK HREF="/nuovo/style_ntsc6.css" REL="stylesheet" TYPE="text/css">');
		break;
	default :
		document.write ('<LINK HREF="/nuovo/style_msie5.css" REL="stylesheet" TYPE="text/css">');
}