// 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
//
// 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);

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);
var is_opera7 = (agt.indexOf("opera 7") != -1 || agt.indexOf("opera/7") != -1);
var is_opera8 = (agt.indexOf("opera 8") != -1 || agt.indexOf("opera/8") != -1);
var is_opera9 = (agt.indexOf("opera 9") != -1 || agt.indexOf("opera/9") != -1);

var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);
var is_opera6up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5);
var is_opera7up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6);
var is_opera8up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6 && !is_opera7);
var is_opera9up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6 && !is_opera7 && !is_opera8);

// 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.  And on Mac IE5+, we look for is_minor in the ua; since 
// it appears to be more accurate than appVersion

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

// ditto Konqueror
                                    
var is_konq = false;
var kqPos = agt.indexOf('konqueror');
if (kqPos != -1)
{
    is_konq = true;
    is_minor = parseFloat(agt.substring(kqPos+10,agt.indexOf(';',kqPos)));
    is_major = parseInt(is_minor);
}

var is_getElementById = (document.getElementById) ? "true" : "false";
var is_getElementsByTagName = (document.getElementsByTagName) ? "true" : "false";
var is_documentElement = (document.documentElement) ? "true" : "false";

var is_safari = ((agt.indexOf('safari') != -1) && (agt.indexOf('mac') != -1)) ? true : false;
var is_khtml = (is_safari || is_konq);

var is_gecko = ((!is_khtml) && (navigator.product) && (navigator.product.toLowerCase()=="gecko")) ? true : false;
var is_gver = 0;
if (is_gecko) is_gver = navigator.productSub;

var is_fb = ((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=="Firebird"));
var is_fx = ((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=="Firefox")||(agt.indexOf('firefox') != -1)));
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) && (!is_fb) && (!is_fx) && ((navigator.vendor=="")||(navigator.vendor=="Mozilla")||(navigator.vendor=="Debian")));
if ((is_moz) || (is_fb) || (is_fx))
{
    var is_moz_ver = (navigator.vendorSub) ? navigator.vendorSub : 0;
    
    if (is_fx && !is_moz_ver)
    {
        is_moz_ver = agt.indexOf('firefox/');
        is_moz_ver = agt.substring(is_moz_ver+8);
        is_moz_ver = parseFloat(is_moz_ver);
    }
    
    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_fb_ver = is_moz_ver;
var is_fx_ver = 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_khtml) && (!(is_moz)) && (!is_fb) && (!is_fx));

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_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);

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

var is_nav6 = (is_nav && is_major==6);
var is_nav6up = (is_nav && is_minor >= 6);

var is_nav5 = (is_nav && is_major == 5 && !is_nav6);
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_nav8 = (is_nav && is_major == 8);
var is_nav8up = (is_nav && is_minor >= 8);

var is_ie = ((iePos != -1) && (!is_opera) && (!is_khtml));
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));
var is_ie5_5up =(is_ie && is_minor >= 5.5);

var is_ie6 = (is_ie && is_major == 6);
var is_ie6up = (is_ie && is_minor >= 6);

var is_ie7 = (is_ie && is_major == 7);
var is_ie7up = (is_ie && is_minor >= 7);

// 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_aol8 = ((agt.indexOf("aol 8") != -1) || (agt.indexOf("aol8") != -1));

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

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));

// *** JAVASCRIPT VERSION CHECK ***
// Useful to workaround Nav3 bug in which Nav3 loads <SCRIPT LANGUAGE="JavaScript1.2">
var is_js;
if (is_nav2 || is_ie3) is_js = 1.0;
else if (is_nav3) is_js = 1.1;
else if ((is_opera5)||(is_opera6)) is_js = 1.3;
else if (is_opera7up) is_js = 1.5;
else if (is_khtml) is_js = 1.5;
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;
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;
else if (is_fb||is_fx) is_js = 1.5;

// 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;

// 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));
var is_win2k = ((agt.indexOf("windows nt 5.0") != -1) || (agt.indexOf("windows 2000") != -1));
var is_winxp = ((agt.indexOf("windows nt 5.1") != -1) || (agt.indexOf("windows xp") != -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"
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; }
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_macosx = (is_mac && (agt.indexOf("os x") != -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);
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);
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));

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";
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";
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());

// Flash checking code adapted from Doc JavaScript information; see http://webref.com/js/column84/2.html
var is_Flash = false;
var is_FlashVersion = 0;

if ((is_nav||is_opera||is_moz||is_fb||is_fx||is_safari)|| (is_mac && is_ie5up))
{
    var plugin = (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"] && navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin) ? navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0;
    if (plugin && plugin.description)
    {
        is_Flash = true;
        is_FlashVersion = parseInt(plugin.description.substring(plugin.description.indexOf(".")-1));
    }
}

if (is_win && is_ie4up)
{
    document.write('<script language=VBScript>\nDim hasPlayer, playerversion\nhasPlayer = false\nplayerversion = 10\nDo While playerversion > 0\nOn Error Resume Next\nhasPlayer = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & playerversion)))\nIf hasPlayer = true Then Exit Do\nplayerversion = playerversion - 1\nLoop\nis_FlashVersion = playerversion\nis_Flash = hasPlayer\n<\/script>');
}