// Ultimate client-side JavaScript client sniff. Version 3.02
// CHANGELOG: Modified transparently (no code change inside function 'Is'; no code break except for moved the 
// global 'is' and 'isIE3Mac' variables to be type-prepended properties of the GloScope object.
// ) -- done for clarity by Christopher M. Balz.
// (C) Netscape Communications 1999.	Permission granted to reuse and distribute.
// Revised 17 May 99 to add is.nav5up and is.ie5up (see below).
// Revised 21 Nov 00 to add is.gecko and is.ie5_5 Also Changed is.nav5 and is.nav5up to is.nav6 and is.nav6up
// Revised 22 Feb 01 to correct Javascript Detection for IE 5.x, Opera 4, 
//											correct Opera 5 detection
//											add support for winME and win2k
//											synch with browser-type-oo.js
// Revised 26 Mar 01 to correct Opera detection

// Everything you always wanted to know about your JavaScript client
// but were afraid to ask ... "Is" is the constructor function for "is" object,
// which has properties indicating:
// (1) browser vendor:
//		 is.nav, is.ie, is.opera, is.hotjava, is.webtv, is.TVNavigator, is.AOLTV
// (2) browser version number:
//		 is.major (integer indicating major version number: 2, 3, 4 ...)
//		 is.minor (float	 indicating full	version number: 2.02, 3.01, 4.04 ...)
// (3) browser vendor AND major version number
//		 is.nav2, is.nav3, is.nav4, is.nav4up, is.nav6, is.nav6up, is.gecko, is.ie3, 
//		 is.ie4, is.ie4up, is.ie5, is.ie5up, is.ie5_5, is.ie5_5up, is.hotjava3, is.hotjava3up
// (4) JavaScript version number:
//		 is.js (float indicating full JavaScript version number: 1, 1.1, 1.2 ...)
// (5) OS platform and version:
//		 is.win, is.win16, is.win32, is.win31, is.win95, is.winnt, is.win98, is.winme, is.win2k
//		 is.os2
//		 is.mac, is.mac68k, is.macppc
//		 is.unix
//		 is.sun, is.sun4, is.sun5, is.suni86
//		 is.irix, is.irix5, is.irix6
//		 is.hpux, is.hpux9, is.hpux10
//		 is.aix, is.aix1, is.aix2, is.aix3, is.aix4
//		 is.linux, is.sco, is.unixware, is.mpras, is.reliant
//		 is.dec, is.sinix, is.freebsd, is.bsd
//		 is.vms
//
// See http://www.it97.de/JavaScript/JS_tutorial/bstat/navobj.html and
// http://www.it97.de/JavaScript/JS_tutorial/bstat/Browseraol.html
// for detailed lists of userAgent strings.
//
// Note: you don't want your Nav4 or IE4 code to "turn off" or
// stop working when Nav5 and IE5 (or later) are released, so
// in conditional code forks, use is.nav4up ("Nav4 or greater")
// and is.ie4up ("IE4 or greater") instead of is.nav4 or is.ie4
// to check version in code which you want to work on future
// versions.

// Begin: section is designed specifically for IE3 for the Mac.
/* -- This is global code, and so I recommend instead putting it in a class somewhere.
if ((navigator.appVersion.indexOf("Mac")!=-1) 
		&& (navigator.userAgent.indexOf("MSIE")!=-1) 
		&& (parseInt(navigator.appVersion)==3)) {
	GloScope.booIsIE3Mac = true;
} else {
	GloScope.booIsIE3Mac = false;
	GloScope.objIs = new Is(); 
}
*/
// End: section designed specifically for IE3 for the Mac.

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 5")==-1) 
									 && (agt.indexOf("msie 6")==-1) ); // 10/9/2001 mod. C.Balz.
		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 6.0")!=-1) ); // 10/9/2001 mod. C.Balz.

		// 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));
} //-Is