// Javascript file for detecting Browser, Browser Version OS - derived from Netscape's Devedge website

function Is() { 
	// convert all characters to lowercase to simplify testing
	var agt=navigator.userAgent.toLowerCase();
	
	// *** BROWSER VERSION ***
	// Note: On IE5, these return 4, so use is.ie5up to detect IE5.
	
	this.major = parseInt(navigator.appVersion);
	this.minor = parseFloat(navigator.appVersion);
	
	// Note: Opera and WebTV spoof Navigator.  We do strict client detection.
	// If you want to allow spoofing, take out the tests for opera and webtv.
	
	this.nav =	((agt.indexOf('mozilla')!=-1) && 
				(agt.indexOf('spoofer')==-1) && 
				(agt.indexOf('compatible') == -1) &&
				(agt.indexOf('opera')==-1) &&
				(agt.indexOf('webtv')==-1) &&
				(agt.indexOf('hotjava')==-1));
				
	this.nav2 =		(this.nav && (this.major == 2));
	this.nav3 =		(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) ||
					(agt.indexOf("; nav") != -1)) );
	this.nav6 =		(this.nav && (this.major == 5));
	this.nav6up =	(this.nav && (this.major >= 5));
	this.gecko =	(agt.indexOf('gecko') != -1);

	this.ie =	((agt.indexOf("msie") != -1) && 
				(agt.indexOf("opera") == -1));
	this.ie3 =	(this.ie && (this.major < 4));
 
	this.ie4 =	(this.ie && (this.major == 4) && 
				(agt.indexOf("msie 4")!=-1) );
	this.ie4up = (this.ie && (this.major >= 4));
	this.ie5 =	(this.ie && (this.major == 4) && 
				(agt.indexOf("msie 5.0")!=-1) );
	this.ie5_5 = (this.ie && (this.major == 4) && (agt.indexOf("msie 5.5") !=-1));
	this.ie5up = (this.ie && !this.ie3 && !this.ie4);
	this.ie5_5up =(this.ie && !this.ie3 && !this.ie4 && !this.ie5);
	this.ie6 = (this.ie && (this.major == 4) && (agt.indexOf("msie 6.")!=-1) );
	this.ie6up = (this.ie && !this.ie3 && !this.ie4 && !this.ie5 && !this.ie5_5);

	// KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
	// or if this is the first browser window opened. Thus the
	// variables is.aol, is.aol3, and is.aol4 aren't 100% reliable.
 
	this.aol = (agt.indexOf("aol") != -1);
	this.aol3 = (this.aol && this.ie3);
	this.aol4 = (this.aol && this.ie4);
	this.aol5 = (agt.indexOf("aol 5") != -1);
	this.aol6 = (agt.indexOf("aol 6") != -1);
 
	this.opera = (agt.indexOf("opera") != -1);
	this.opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
	this.opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
	this.opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
	this.opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
	this.opera5up = (this.opera && !this.opera2 && !this.opera3 && !this.opera4);

	this.webtv = (agt.indexOf("webtv") != -1); 

	this.TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
	this.AOLTV = this.TVNavigator;

	this.hotjava = (agt.indexOf("hotjava") != -1);
	this.hotjava3 = (this.hotjava && (this.major == 3));
 
	this.hotjava3up = (this.hotjava && (this.major >= 3));

	// *** JAVASCRIPT VERSION CHECK ***
	if (this.nav2 || this.ie3) this.js = 1.0;
	else if (this.nav3) this.js = 1.1;
	else if (this.opera5up) this.js = 1.3;
	else if (this.opera) this.js = 1.1;
	else if ((this.nav4 && (this.minor <= 4.05)) || this.ie4) this.js = 1.2;
	else if ((this.nav4 && (this.minor > 4.05)) || this.ie5) this.js = 1.3;
	else if (this.hotjava3up) this.js = 1.4;
	else if (this.nav6 || this.gecko) this.js = 1.5;
	// NOTE: In the future, update this code when newer versions of JS
	// are released. For now, we try to provide some upward compatibility
	// so that future versions of Nav and IE will show they are at
	// *least* JS 1.x capable. Always check for JS version compatibility
	// with > or >;=.
 	else if (this.nav6up) this.js = 1.5;
	// note ie5up on mac is 1.4
	else if (this.ie5up) this.js = 1.3
	// HACK: no idea for other browsers; always check for JS version with > or >=
	else this.js = 0.0;

	// *** PLATFORM ***
	this.win = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
 
	// NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all
	// Win32, so you can't distinguish between Win95 and WinNT.
	this.win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));

	// is this a 16 bit compiled version?
	this.win16 =	((agt.indexOf("win16")!=-1) || 
					(agt.indexOf("16bit")!=-1) || 
					(agt.indexOf("windows 3.1")!=-1) || 
					(agt.indexOf("windows 16-bit")!=-1) ); 

 	this.win31 =	((agt.indexOf("windows 3.1")!=-1) || 
					(agt.indexOf("win16")!=-1) ||
					(agt.indexOf("windows 16-bit")!=-1));
					
	// NOTE: Reliable detection of Win98 may not be possible. It appears that:
	// - On Nav 4.x and before you'll get plain "Windows" in userAgent.
	// - On Mercury client, the 32-bit version will return "Win98", but
	// the 16-bit version running on Win98 will still return "Win95".
	this.win98 =	((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
	this.winnt =	((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
	this.win32 =	(this.win95 || this.winnt || this.win98 || 
					((this.major >= 4) && (navigator.platform == "Win32")) ||
					(agt.indexOf("win32")!=-1) || 
					(agt.indexOf("32bit")!=-1));
	this.winme =	((agt.indexOf("win 9x 4.90")!=-1));
	this.win2k =	((agt.indexOf("windows nt 5.0")!=-1));
 
	this.os2 =		((agt.indexOf("os/2")!=-1) || 
					(navigator.appVersion.indexOf("OS/2")!=-1) || 
					(agt.indexOf("ibm-webexplorer")!=-1));
 
	this.mac =	(agt.indexOf("mac")!=-1);
	// hack ie5 js version for mac
	if (this.mac && this.ie5up) 
		this.js = 1.4;
	this.mac68k =	(this.mac && ((agt.indexOf("68k")!=-1) || 
					(agt.indexOf("68000")!=-1)));
	this.macppc = (this.mac && ((agt.indexOf("ppc")!=-1) || (agt.indexOf("powerpc")!=-1)));

	this.sun = (agt.indexOf("sunos")!=-1);
	this.sun4 = (agt.indexOf("sunos 4")!=-1);
	this.sun5 = (agt.indexOf("sunos 5")!=-1);
	this.suni86= (this.sun && (agt.indexOf("i86")!=-1));
	this.irix = (agt.indexOf("irix") !=-1); // SGI
	this.irix5 = (agt.indexOf("irix 5") !=-1);
	this.irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6") !=-1));
	this.hpux = (agt.indexOf("hp-ux")!=-1);
	this.hpux9 = (this.hpux && (agt.indexOf("09.")!=-1));
	this.hpux10= (this.hpux && (agt.indexOf("10.")!=-1));
 
	this.aix = (agt.indexOf("aix") !=-1); // IBM
	this.aix1 = (agt.indexOf("aix 1") !=-1); 
	this.aix2 = (agt.indexOf("aix 2") !=-1); 
	this.aix3 = (agt.indexOf("aix 3") !=-1); 
	this.aix4 = (agt.indexOf("aix 4") !=-1); 
	this.linux = (agt.indexOf("inux")!=-1);
	this.sco = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
 
	this.unixware = (agt.indexOf("unix_system_v")!=-1); 
 
	this.mpras = (agt.indexOf("ncr")!=-1); 
	this.reliant = (agt.indexOf("reliantunix")!=-1);
	this.dec =	((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || 
				(agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || 
				(agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 

	this.sinix = (agt.indexOf("sinix")!=-1);
	this.freebsd = (agt.indexOf("freebsd")!=-1);
	this.bsd = (agt.indexOf("bsd")!=-1);
	this.unix = ((agt.indexOf("x11")!=-1) || this.sun || this.irix || this.hpux || 
				this.sco ||this.unixware || this.mpras || this.reliant || 
				this.dec || this.sinix || this.aix || this.linux || this.bsd || 
				this.freebsd);

	this.vms = ((agt.indexOf("vax")!=-1) || (agt.indexOf("openvms")!=-1));
}

// use by referring to is.member_var as a boolean expression

var is = new Is();