browser="";
version="";
var os = navigator.platform;
switch (navigator.appName){
	case "Netscape":
		browser="ns";
		version=parseInt(navigator.appVersion);
	break;
	case "Microsoft Internet Explorer":
		browser = "ie";		
		if (navigator.userAgent.indexOf('MSIE 4')>0)version = 4;
		if (navigator.userAgent.indexOf('MSIE 5')>0)version = 5;
		if (navigator.userAgent.indexOf('MSIE 6')>0)version = 6;
		if (version=="")version="unknown";
	break;
		
	default:
		browser="unknown";	
		version="unknown";
	break;
}