//

// JavaScript Browser Sniffer

// Eric Krok, Andy King, Michel Plungjan Jan. 31, 2002

// see http://www.webreference.com/ for more information

//

// This program is free software; you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation; either version 2 of the License, or

//  (at your option) any later version.

//

// please send any improvements to aking@internet.com and we'll

// roll the best ones in

//

// adapted from Netscape's Ultimate client-side JavaScript client sniffer

// and andy king's sniffer

// Revised May 7 99 to add is.nav5up and is.ie5up (see below). (see below).

// Revised June 11 99 to add additional props, checks

// Revised June 23 99 added screen props - gecko m6 doesn't support yet - abk

//                    converted to var is_ from is object to work everywhere

// 990624 - added cookie forms links frames checks - abk

// 001031 - ie4 mod 5.0 -> 5. (ie5.5 mididentified - abk)

//          is_ie4 mod tp work with ie6+ - abk

// 001120 - ns6 released, document.layers false, put back in

//        - is_nav6 test added - abk

// 001121 - ns6+ added, used document.getElementById, better test, dom-compl

// 010117 - actual version for ie3-5.5 by Michel Plungjan

// 010118 - actual version for ns6 by Michel Plungjan

// 010217 - netscape 6/mz 6 ie5.5 onload defer bug docs - abk

// 011107 - added is_ie6 and is_ie6up variables - dmr

// 020128 - added link to netscape's sniffer, on which this is based - abk

//          updated sniffer for aol4-6, ie5mac = js1.4, TVNavigator, AOLTV,

//          hotjava

// 020131 - cleaned up links, added more links to example object detection

// 020131 - a couple small problems with Opera detection. First, when Opera

//          is set to be compatible with other browsers it will contain their

//          information in the userAgent strings. Thus, to be sure we have 

//          Opera we should check for it before checking for the other bigs.

//          (And make sure the others are !opera.) Also corrected a minor

//          bug in the is_opera6up assignment.

// 020214 - Added link for Opera/JS compatibility; added improvements for 

//          windows xp/2000 id in opera and aol 7 id (thanks to Les

//          Hill, Les.Hill@getronics.com, for the suggestion).

// 020531 - Added N6/7 and moz identifiers. 

// 020605 - Added mozilla guessing, Netscape 7 identification, and cleaner

//          identification for Netscape 6. (this comment added after code 

//          changes)

// 020725 - Added is_gecko. -- dmr

//

// Everything you always wanted to know about your JavaScript client

// but were afraid to ask. Creates "is_" variables indicating:

// (1) browser vendor:

//     is_nav, is_ie, is_opera

// (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_nav5, is_nav5up, 

//     is_nav6, is_nav6up, is_ie3, is_ie4, is_ie4up, is_ie5up, is_ie6...

// (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_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

//

// based in part on 

// http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html

// The Ultimate JavaScript Client Sniffer

// and Andy King's object detection sniffer

//

// 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. For DOM tests scripters commonly used the 

// is_getElementById test, but make sure you test your code as

// filter non-compliant browsers (Opera 5-6 for example) as some 

// browsers return true for this test, and don't fully support

// the W3C's DOM1.

//

//



// convert all characters to lowercase to simplify testing

var agt    = navigator.userAgent.toLowerCase();

var appVer = navigator.appVersion.toLowerCase();



// *** BROWSER VERSION ***



var is_minor = parseFloat(appVer);

var is_major = parseInt(is_minor);



// Note: On IE, start of appVersion return 3 or 4

// which supposedly is the version of Netscape it is compatible with.

// So we look for the real version further on in the string



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_getElementById   = (document.getElementById) ? "true" : "false"; // 001121-abk

var is_getElementsByTagName = (document.getElementsByTagName) ? "true" : "false"; // 001127-abk

var is_documentElement = (document.documentElement) ? "true" : "false"; // 001121-abk



var is_gecko = ((navigator.product)&&(navigator.product.toLowerCase()=="gecko"))?true:false;

var is_gver  = 0;

if (is_gecko) is_gver=navigator.productSub;



var is_moz   = ((agt.indexOf('mozilla/5')!=-1) && (agt.indexOf('spoofer')==-1) &&

                (agt.indexOf('compatible')==-1) && (agt.indexOf('opera')==-1)  &&

                (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1)     &&

                (is_gecko) && 

                ((navigator.vendor=="")||(navigator.vendor=="Mozilla")));

if (is_moz) {

   var is_moz_ver = (navigator.vendorSub)?navigator.vendorSub:0;

   if(!(is_moz_ver)) {

       is_moz_ver = agt.indexOf('rv:');

       is_moz_ver = agt.substring(is_moz_ver+3);

       is_paren   = is_moz_ver.indexOf(')');

       is_moz_ver = is_moz_ver.substring(0,is_paren);

   }

   is_minor = is_moz_ver;

   is_major = parseInt(is_moz_ver);

}



var is_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)

            && (!(is_moz)));



// Netscape6 is mozilla/5 + Netscape6/6.0!!!

// Mozilla/5.0 (Windows; U; Win98; en-US; m18) Gecko/20001108 Netscape6/6.0

// Changed this to use navigator.vendor/vendorSub - dmr 060502   

// var nav6Pos = agt.indexOf('netscape6');

// if (nav6Pos !=-1) {

if ((navigator.vendor)&&

    ((navigator.vendor=="Netscape6")||(navigator.vendor=="Netscape"))&&

    (is_nav)) {

   is_major = parseInt(navigator.vendorSub);

   // here we need is_minor as a valid float for testing. We'll

   // revert to the actual content before printing the result. 

   is_minor = parseFloat(navigator.vendorSub);

}



var is_opera = (agt.indexOf("opera") != -1);

var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);

var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);

var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);

var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);

var is_opera6 = (agt.indexOf("opera 6") != -1 || agt.indexOf("opera/6") != -1); // new 020128- abk

var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

var is_opera6up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5); // new020128



var is_nav2 = (is_nav && (is_major == 2));

var is_nav3 = (is_nav && (is_major == 3));

var is_nav4 = (is_nav && (is_major == 4));

var is_nav4up = (is_nav && is_minor >= 4);  // changed to is_minor for

                                            // consistency - dmr, 011001

var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||

                      (agt.indexOf("; nav") != -1)) );



var is_nav6   = (is_nav && is_major==6);    // new 010118 mhp

var is_nav6up = (is_nav && is_minor >= 6) // new 010118 mhp



var is_nav5   = (is_nav && is_major == 5 && !is_nav6); // checked for ns6

var is_nav5up = (is_nav && is_minor >= 5);



var is_nav7   = (is_nav && is_major == 7);

var is_nav7up = (is_nav && is_minor >= 7);



var is_ie   = ((iePos!=-1) && (!is_opera));

var is_ie3  = (is_ie && (is_major < 4));



var is_ie4   = (is_ie && is_major == 4);

var is_ie4up = (is_ie && is_minor >= 4);

var is_ie5   = (is_ie && is_major == 5);

var is_ie5up = (is_ie && is_minor >= 5);



var is_ie5_5  = (is_ie && (agt.indexOf("msie 5.5") !=-1)); // 020128 new - abk

var is_ie5_5up =(is_ie && is_minor >= 5.5);                // 020128 new - abk



var is_ie6   = (is_ie && is_major == 6);

var is_ie6up = (is_ie && is_minor >= 6);



// 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.



var is_aol   = (agt.indexOf("aol") != -1);

var is_aol3  = (is_aol && is_ie3);

var is_aol4  = (is_aol && is_ie4);

var is_aol5  = (agt.indexOf("aol 5") != -1);

var is_aol6  = (agt.indexOf("aol 6") != -1);

var is_aol7  = ((agt.indexOf("aol 7")!=-1) || (agt.indexOf("aol7")!=-1));



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



// new 020128 - abk



var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 

var is_AOLTV = is_TVNavigator;



var is_hotjava = (agt.indexOf("hotjava") != -1);

var is_hotjava3 = (is_hotjava && (is_major == 3));

var is_hotjava3up = (is_hotjava && (is_major >= 3));



// end new



// *** JAVASCRIPT VERSION CHECK ***

// Useful to workaround Nav3 bug in which Nav3

// loads <SCRIPT LANGUAGE="JavaScript1.2">.

// updated 020131 by dragle

var is_js;

if (is_nav2 || is_ie3) is_js = 1.0;

else if (is_nav3) is_js = 1.1;

else if (is_opera5up) is_js = 1.3; // 020214 - dmr

else if (is_opera) is_js = 1.1;

else if ((is_nav4 && (is_minor <= 4.05)) || is_ie4) is_js = 1.2;

else if ((is_nav4 && (is_minor > 4.05)) || is_ie5) is_js = 1.3;

else if (is_nav5 && !(is_nav6)) is_js = 1.4;

else if (is_hotjava3up) is_js = 1.4; // new 020128 - abk

else if (is_nav6up) is_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 (is_nav && (is_major > 5)) is_js = 1.4;

else if (is_ie && (is_major > 5)) is_js = 1.3;

else if (is_moz) is_js = 1.5;



// what about ie6 and ie6up for js version? abk



// HACK: no idea for other browsers; always check for JS version 

// with > or >=

else is_js = 0.0;

// HACK FOR IE5 MAC = js vers = 1.4 (if put inside if/else jumps out at 1.3)

if ((agt.indexOf("mac")!=-1) && is_ie5up) is_js = 1.4; // 020128 - abk



// Done with is_minor testing; revert to real for N6/7

if (is_nav6up) {

   is_minor = navigator.vendorSub;

}



// *** PLATFORM ***

var is_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.

var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));



// is this a 16 bit compiled version?

var is_win16 = ((agt.indexOf("win16")!=-1) ||

           (agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) ||

           (agt.indexOf("windows 16-bit")!=-1) );



var is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) ||

                (agt.indexOf("windows 16-bit")!=-1));



var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));    // new 020128 - abk

var is_win2k = ((agt.indexOf("windows nt 5.0")!=-1) || (agt.indexOf("windows 2000")!=-1)); // 020214 - dmr

var is_winxp = ((agt.indexOf("windows nt 5.1")!=-1) || (agt.indexOf("windows xp")!=-1)); // 020214 - dmr



// 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".

var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));

var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));

var is_win32 = (is_win95 || is_winnt || is_win98 ||

                ((is_major >= 4) && (navigator.platform == "Win32")) ||

                (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));



var is_os2   = ((agt.indexOf("os/2")!=-1) ||

                (navigator.appVersion.indexOf("OS/2")!=-1) ||

                (agt.indexOf("ibm-webexplorer")!=-1));



var is_mac    = (agt.indexOf("mac")!=-1);

if (is_mac) { is_win = !is_mac; } // dmr - 06/20/2002

var is_mac68k = (is_mac && ((agt.indexOf("68k")!=-1) ||

                           (agt.indexOf("68000")!=-1)));

var is_macppc = (is_mac && ((agt.indexOf("ppc")!=-1) ||

                            (agt.indexOf("powerpc")!=-1)));



var is_sun   = (agt.indexOf("sunos")!=-1);

var is_sun4  = (agt.indexOf("sunos 4")!=-1);

var is_sun5  = (agt.indexOf("sunos 5")!=-1);

var is_suni86= (is_sun && (agt.indexOf("i86")!=-1));

var is_irix  = (agt.indexOf("irix") !=-1);    // SGI

var is_irix5 = (agt.indexOf("irix 5") !=-1);

var is_irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6") !=-1));

var is_hpux  = (agt.indexOf("hp-ux")!=-1);

var is_hpux9 = (is_hpux && (agt.indexOf("09.")!=-1));

var is_hpux10= (is_hpux && (agt.indexOf("10.")!=-1));

var is_aix   = (agt.indexOf("aix") !=-1);      // IBM

var is_aix1  = (agt.indexOf("aix 1") !=-1);

var is_aix2  = (agt.indexOf("aix 2") !=-1);

var is_aix3  = (agt.indexOf("aix 3") !=-1);

var is_aix4  = (agt.indexOf("aix 4") !=-1);

var is_linux = (agt.indexOf("inux")!=-1);

var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);

var is_unixware = (agt.indexOf("unix_system_v")!=-1);

var is_mpras    = (agt.indexOf("ncr")!=-1);

var is_reliant  = (agt.indexOf("reliantunix")!=-1);

var is_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));

var is_sinix = (agt.indexOf("sinix")!=-1);

var is_freebsd = (agt.indexOf("freebsd")!=-1);

var is_bsd = (agt.indexOf("bsd")!=-1);

var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux ||

             is_sco ||is_unixware || is_mpras || is_reliant ||

             is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);



var is_vms   = ((agt.indexOf("vax")!=-1) || (agt.indexOf("openvms")!=-1));

// additional checks, abk

var is_anchors = (document.anchors) ? "true":"false";

var is_regexp = (window.RegExp) ? "true":"false";

var is_option = (window.Option) ? "true":"false";

var is_all = (document.all) ? "true":"false";

// cookies - 990624 - abk

document.cookie = "cookies=true";

var is_cookie = (document.cookie) ? "true" : "false";

var is_images = (document.images) ? "true":"false";

var is_layers = (document.layers) ? "true":"false"; // gecko m7 bug?

// new doc obj tests 990624-abk

var is_forms = (document.forms) ? "true" : "false";

var is_links = (document.links) ? "true" : "false";

var is_frames = (window.frames) ? "true" : "false";

var is_screen = (window.screen) ? "true" : "false";



// java

var is_java = (navigator.javaEnabled());