// (C) Netscape Communications 1999-2001.  Permission granted to reuse and distribute.
// 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, 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,
//     is_opera2, is_opera3, is_opera4, is_opera5, is_opera5up
// (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
var agt=navigator.userAgent.toLowerCase();
// *** BROWSER VERSION ***
// Note: On IE5, these return 4, so use is_ie5up to detect IE5.
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) && (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_major >= 4));
var is_navonly = (is_nav && ((agt.indexOf(";nav") != -1) ||
                 (agt.indexOf("; nav") != -1)) );
var is_nav6 = (is_nav && (is_major == 5));
var is_nav6up = (is_nav && (is_major >= 5));
var is_gecko = (agt.indexOf('gecko') != -1);
var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie3    = (is_ie && (is_major < 4));
var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5")==-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_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
// 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_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_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);
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));
var is_konqueror = (agt.indexOf('konqueror') != -1);

// *** JAVASCRIPT VERSION CHECK ***
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;
  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_hotjava3up) is_js = 1.4;
  else if (is_nav6 || is_gecko) 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_nav6up) is_js = 1.5;
// NOTE: ie5up on mac is 1.4
  else if (is_ie5up) 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));
var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));
var is_win2k = ((agt.indexOf("windows nt 5.0")!=-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);
// hack ie5 js version for mac
if (is_mac && is_ie5up) is_js = 1.4;
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));

// you can change these if you want...
var is_nonDHTML = ( is_opera || (is_nav && !is_gecko) || is_hotjava || is_webtv || is_TVNavigator || is_AOLTV || is_konqueror );
var closeIcon = "<IMG align=middle alt=\"Click to Close\" border=0 src=\"/images/close_icon.gif\">";
var openIcon = "<IMG align=middle alt=\"Click to Open\" border=0 src=\"/images/open_icon.gif\">";

function cat( name, open )
{
        this.name = name;
        this.open = open;
        this.cats = new Array();
        this.links = new Array();
}

var cats = new Array();
var initFlag = 1;

function openBranch( position, change )
{
	var indexArray = position.split("-");
	var builtPosition = "cats[" + indexArray[0] + "]";

	for ( var x=1; x < indexArray.length ; x++ )
        { builtPosition += ".cats[" + indexArray[x] + "]"; }

	eval(builtPosition).open = change;
	displayAllCats();
}	
 
function displayAllCats( type )
{
// Loop through the first level of the array/object and then hand off the recursion to displayCat
// so we can uniquely modify the top categories

	var out="";
	var cl = cats.length;

	if ( initFlag == 1 )
	{
		// everything is opened if there are only a few cats
		if ( cl <= 6 ) { for ( var v=0; v < cl; v++ ) { cats[v].open = 1; } }
		initFlag = 0;
	}

	// loop through the main categories
	for ( var i=0; i < cl; i++ )
        {
	        if ( cats[i].open == 0 )
	        {
	                if ( is_nonDHTML )
	                {
	                        catImage = closeIcon + " ";
	                } else {
	                        catImage = "<A href=\"javascript:openBranch('" + i + "',1);\">" + openIcon + "</A> ";
	                }
	        } else {
	                catImage = "<A href=\"javascript:openBranch('" + i + "',0);\">" + closeIcon + "</A> ";
	        }

		// Print out the category header
		out += catImage + "<b>" + cats[i].name + "</b><br>";

		// speed up
		var cll = cats[i].links.length;
		var ccl = cats[i].cats.length;

		if ( (cats[i].open == 1 || is_nonDHTML) )
		{

	                // If the category has links print them out
	                if ( cll )
	                {
	                        for ( var x=0; x < cll; x++ )
	                        {
	                               out += "&nbsp;&nbsp;" + cats[i].links[x] + "<br>";
	                        }
	                }

	                // SubCategories need recursion
	                if ( ccl )
	                {
				for ( var y=0; y < ccl; y++ )
				{
					out += displayCat( cats[i].cats[y], "", (i.toString() + "-" + y.toString()) );
				}
			}
		}
	}

	// "the" output...
        if ( type == "raw" )
	{
		return(out);
	} else {
		if(is_gecko) { document.getElementById("content").innerHTML = out; }
		if(is_ie) { document.all["content"].innerHTML = out; }
	}
}

function displayCat( category, tabs, position )
{
        var outp = "";
        tabs += "&nbsp;&nbsp;";

        if ( category.open == 0 )
        {
                if ( is_nonDHTML )
                {
                        catImage = closeIcon + " ";
                } else {
                        catImage = "<A href=\"javascript:openBranch('" + position + "',1);\">" + openIcon + "</A> ";
                }
        } else {
                catImage = "<A href=\"javascript:openBranch('" + position + "',0);\">" + closeIcon + "</A> ";
        }

        // Print out the category header //
        outp += tabs + catImage + category.name + "<br>";

	// speed up
	var cll = category.links.length;
	var ccl = category.cats.length;

        if ( (category.open == 1 || is_nonDHTML) )
        {
                if ( cll )
                {
                        for ( var x=0; x < cll; x++ )
                        { outp += tabs + "&nbsp;&nbsp;" + category.links[x] + "<br>"; }
                }

                if ( ccl )
                {
                        for ( var y=0; y < ccl; y++ )
                        {
                                outp += displayCat( category.cats[y], tabs, (position + "-" + y.toString()) );
                        }
                }
        }
        return outp;
}