var Macintosh = navigator.appVersion.indexOf('Mac',0) != -1;
var Windows = navigator.appVersion.indexOf('Win',0) != -1;
var Netscape = navigator.appName.indexOf('Netscape',0) != -1;
var InternetEx = navigator.appName.indexOf('Microsoft Internet Explorer',0) != -1;
var Version = navigator.appVersion.charAt(0); 
if(navigator.appVersion.indexOf('MSIE 5',0) != -1){Version++;}

var IsNav4,IsIE4,IsNav6;
if(parseInt(navigator.appVersion.charAt(0)) >= 4){
	if (document.layers)	IsNav4 = true;
	else					IsNav4 = false;
	if (document.all)	IsIE4 = true;
	else				IsIE4 = true;
	if (document.getElementById&&!document.all)	IsNav6 = true;
	else										IsNav6 = false;
}