// Ultimate client-side JavaScript client sniff. 
// (C) Netscape Communications 1999.  Permission granted to reuse and distribute. 
// Revised 17 May 99 to add is_nav5up and is_ie5up (see below). 

// 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_ie3, is_ie4, is_ie4up 
// (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 
// 
// 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. 

    // 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. 
    // Note: the is_ie5up variable is screwed up as originally coded- ADE
    var is_major = parseInt(navigator.appVersion); 
    var is_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. 
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) 
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) 
                && (agt.indexOf('webtv')==-1)); 
    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_major >= 4)); 
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) || 
                          (agt.indexOf("; nav") != -1)) ); 
    var is_nav5 = (is_nav && (is_major == 5)); 
    var is_nav5up = (is_nav && (is_major >= 5)); 

    // Note: added check for Nav6- ADE
    var is_nav6 = (is_nav && (is_major == 5));

    // Note: added check for Opera
    var is_opera   = (agt.indexOf('opera') != -1); 

    // Note: added check for iCab- ADE
    var is_icabpre2 = (agt.indexOf('icab/pre2.') != -1);

    var is_ie   = (agt.indexOf("msie") != -1); 
    var is_ie3  = (is_ie && (is_major < 4)); 
//  var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) ); 
    var is_ie4  = (is_ie && (is_major == 4) && 
                  ((agt.indexOf("msie 5.") == -1) && 
                   (agt.indexOf("msie 6.") == -1)) ); 
    var is_ie4up  = (is_ie  && (is_major >= 4)); 
//  var is_ie5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) ); 
    var is_ie5  = ((is_ie && (is_major == 4)) &&
                   ((agt.indexOf("msie 5.")!=-1) && (agt.indexOf("msie 6.")!=-1))); 
    var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4); 

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

    // *** JAVASCRIPT VERSION CHECK *** 
    var is_js; 
    if (is_nav2 || is_ie3) is_js = 1.0 
    else if (is_nav3 || 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_js = 1.4 
    // 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 
    // HACK: no idea for other browsers; always check for JS version with > or >= 
    else is_js = 0.0; 

    // *** 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));

    // 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);
    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));

    // NOTE: The following routine is my own- ADE 7/15

    function minimalSniff(doFork) {
      checkWindowOpened = 1;
      checkWindow = window.open('','checkWindow','resizable=1,scrollbars=1,status=1,width=450,height=300');
      checkWindow.document.write('<HTML>\n<HEAD>\n<TITLE>Sniffer' +
        '<\/TITLE>\n<BODY STYLE=\"background: #FFFFFF\">\n' +
        '<H2 STYLE=\"text-align: center\">userAgent Detection<\/H2>');
      if (doFork) {
        checkWindow.document.write('<P>*****Copy Below This Line*****<\/P>\n' +
          '<Pre>');
      }
      checkWindow.document.write(navigator.userAgent + '<BR>Major=' +
        is_major + '<\/Pre>\n');
      if (doFork) {
        checkWindow.document.write('<P>*****Copy Above This Line*****<\/P>\n' + 
          '<P>If you could copy the information line(s) and email it to me ' +
          'along with operating system (Macintosh, Windows 95, etc.), ' +
          'browser (Internet Explorer, Netscape, AOL, etc.), and version ' +
          '(3, 4.72, 5.0, etc.) I\'d appreciate it!');
      }
      checkWindow.document.write('<BR><BR>\nAlan D. Earhart- ' +
        '<A HREF=\"mailto:aearhart@femtowatt-club.com\">' +
        'aearhart@femtowatt-club.com</A><\/P>\n');
      checkWindow.document.write('<DIV STYLE=\"text-align: center\">\n' +
        '<FORM>\n<INPUT TYPE=BUTTON onClick=\"window.close()\"\n' +
        'onMouseOver=\"self.status=\'Close this window\';return true\"\n' +
        'onMouseOut=\"self.status=\'\';return true\"\n' +
        'VALUE=\"Close Window\">\n<\/FORM>\n<\/DIV>\n<\/BODY>\n<\/HTML>');
      checkWindow.document.close();
      checkWindow.focus();
    }