var agt=navigator.userAgent.toLowerCase();
var appVer = navigator.appVersion.toLowerCase();

var is_minor = parseFloat(appVer);
var is_major = parseInt(is_minor);

var iePos  = appVer.indexOf('msie');
if (iePos !=-1) {
   is_minor = parseFloat(appVer.substring(iePos+5,appVer.indexOf(';',iePos)))
   is_major = parseInt(is_minor);
}

var is_ie = (iePos!=-1);
var is_ie4 = (is_ie && is_major == 4);
var is_ie6   = (is_ie && is_major == 6);
var is_ie6up = (is_ie && is_minor >= 6);


function browserSniffer() {
	this.browserVersion = parseInt(navigator.appVersion);
	this.browserPlatform = navigator.platform;
	this.browserName = navigator.appName;

	this.isOpera = (this.browserName.indexOf('Opera') > -1) ? true : false;
	this.isNavigator = (this.browserName.indexOf('Netscape') > -1) ? true : false;
	this.isExplorer = (this.browserName.indexOf('Explorer') > -1) ? true : false;
	
	this.isMac = (this.browserPlatform.indexOf('Mac') > -1) ? true : false;
	
	this.isFour = (this.browserVersion == 4) ? true : false;
	
	this.isIE3 = ((this.browserVersion == 3) && (this.isExplorer)) ? true : false;
	this.isNS4 = ((this.browserVersion == 4) && (this.isNavigator)) ? true : false;
	this.isNS6 = ((this.browserVersion == 5) && (this.isNavigator)) ? true : false;
}