// JavaScript Browser Sniffer

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

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

// Comments removed from this version; see webreference.com for official source.



    // 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);

    }



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

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

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

    if (nav6Pos !=-1) {

       is_minor = parseFloat(agt.substring(nav6Pos+10))

       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_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_opera7 = (agt.indexOf("opera 7") != -1 || agt.indexOf("opera/7") != -1); // new 020307- jfc

    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_opera7up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6); // new 020307 jfc



    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));

    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_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_nav6) 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



    // 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



    // *** 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);

    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

// Commented out - 020925 - jfc

//	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());