// The following Is function is from Netscape's documentation
// Ultimate client-side JavaScript client sniff.
// (C) Netscape Communications 1998.  Permission granted to reuse and distribute.
// Revised 20 April 98 to add is.nav4up and is.ie4up (see below).
function Is () {
	// convert all characters to lowercase to simplify testing
	var agt			= navigator.userAgent.toLowerCase()

	// *** BROWSER VERSION ***
	this.major		= parseInt(navigator.appVersion);
	this.minor		= parseFloat(navigator.appVersion);
	
	this.nav		=
		agt.indexOf('mozilla') != -1 &&
		agt.indexOf('spoofer') == -1 &&
		agt.indexOf('compatible') == -1;
	this.nav2		= this.nav && this.major == 2;
	this.nav3		= this.nav && this.major == 3;
	//Jonie added this line in
	this.nav3up		= this.nav && this.major >= 3;
	this.nav4		= this.nav && this.major == 4;
	this.nav4up		= this.nav && this.major >= 4;
	this.navonly	= this.nav && agt.indexOf(";nav") != -1;
	
	this.ie			= agt.indexOf("msie") != -1;
	this.ie3		= this.ie && this.major == 2;
	this.ie4		= this.ie && this.major == 4;
	this.ie4up		= this.ie  && this.major >= 4;
	
	this.opera		= agt.indexOf("opera") != -1;
}

var is;
var isIE3Mac = false;
// this section is designed specifically for IE3 for the Mac
if (
	navigator.appVersion.indexOf("Mac") != -1 &&
	navigator.userAgent.indexOf("MSIE") != -1 && 
	parseInt(navigator.appVersion) == 3
)
	isIE3Mac = true;
else
	is = new Is();

var is_okay = !isIE3Mac && (is.ie4up || is.nav3up);