var detect_obj = new detect();

/*constructs the detect object*/
function detect()
{
	// 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.
    this.is_major = parseInt(navigator.appVersion);
    this.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.
    this.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));
    this.is_nav2 = (this.is_nav && (this.is_major == 2));
    this.is_nav3 = (this.is_nav && (this.is_major == 3));
    this.is_nav4 = (this.is_nav && (this.is_major == 4));
    this.is_nav4up = (this.is_nav && (this.is_major >= 4));
    this.is_navonly      = (this.is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );
    this.is_nav6 = (this.is_nav && (this.is_major == 5));
    this.is_nav6up = (this.is_nav && (this.is_major >= 5));
    this.is_gecko = (agt.indexOf('gecko') != -1);


    this.is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    this.is_ie3    = (this.is_ie && (this.is_major < 4));
    this.is_ie4    = (this.is_ie && (this.is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    this.is_ie4up  = (this.is_ie && (this.is_major >= 4));
    this.is_ie5    = (this.is_ie && (this.is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    this.is_ie5_5  = (this.is_ie && (this.is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    this.is_ie5up  = (this.is_ie && !this.is_ie3 && !this.is_ie4);
    this.is_ie5_5up =(this.is_ie && !this.is_ie3 && !this.is_ie4 && !this.is_ie5);
    this.is_ie6    = (this.is_ie && (this.is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
    this.is_ie6up  = (this.is_ie && !this.is_ie3 && !this.is_ie4 && !this.is_ie5 && !this.is_ie5_5);

    // 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.
    this.is_aol   = (agt.indexOf("aol") != -1);
    this.is_aol3  = (this.is_aol && this.is_ie3);
    this.is_aol4  = (this.is_aol && this.is_ie4);
    this.is_aol5  = (agt.indexOf("aol 5") != -1);
    this.is_aol6  = (agt.indexOf("aol 6") != -1);

    this.is_opera = (agt.indexOf("opera") != -1);
    this.is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    this.is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    this.is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    this.is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
    this.is_opera5up = (this.is_opera && !this.is_opera2 && !this.is_opera3 && !this.is_opera4);

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

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

    this.is_hotjava = (agt.indexOf("hotjava") != -1);
    this.is_hotjava3 = (this.is_hotjava && (this.is_major == 3));
    this.is_hotjava3up = (this.is_hotjava && (this.is_major >= 3));

    // *** JAVASCRIPT VERSION CHECK ***
    
    if (this.is_nav2 || this.is_ie3) is_js = 1.0;
    else if (this.is_nav3) is_js = 1.1;
    else if (this.is_opera5up) is_js = 1.3;
    else if (this.is_opera) this.is_js = 1.1;
    else if ((this.is_nav4 && (this.is_minor <= 4.05)) || this.is_ie4) this.is_js = 1.2;
    else if ((this.is_nav4 && (this.is_minor > 4.05)) || this.is_ie5) this.is_js = 1.3;
    else if (this.is_hotjava3up) this.is_js = 1.4;
    else if (this.is_nav6 || this.is_gecko) this.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 (this.is_nav6up) this.is_js = 1.5;
    // NOTE: ie5up on mac is 1.4
    else if (this.is_ie5up) this.is_js = 1.3

    // HACK: no idea for other browsers; always check for JS version with > or >=
    else is_js = 0.0;

    // *** PLATFORM ***
    this.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.
    this.is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));

    // is this a 16 bit compiled version?
    this.is_win16 = ((agt.indexOf("win16")!=-1) || 
               (agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) || 
               (agt.indexOf("windows 16-bit")!=-1) );  

    this.is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) ||
                    (agt.indexOf("windows 16-bit")!=-1));

    this.is_winme = ((agt.indexOf("win 9x 4.90")!=-1));
    this.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".
    this.is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
    this.is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
    this.is_win32 = (this.is_win95 || this.is_winnt || this.is_win98 || 
                    ((this.is_major >= 4) && (navigator.platform == "Win32")) ||
                    (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));

    this.is_os2   = ((agt.indexOf("os/2")!=-1) || 
                    (navigator.appVersion.indexOf("OS/2")!=-1) ||   
                    (agt.indexOf("ibm-webexplorer")!=-1));

    this.is_mac    = (agt.indexOf("mac")!=-1);
    // hack ie5 js version for mac
    if (this.is_mac && this.is_ie5up) this.is_js = 1.4;
    this.is_mac68k = (this.is_mac && ((agt.indexOf("68k")!=-1) || 
                               (agt.indexOf("68000")!=-1)));
    this.is_macppc = (this.is_mac && ((agt.indexOf("ppc")!=-1) || 
                                (agt.indexOf("powerpc")!=-1)));

    this.is_sun   = (agt.indexOf("sunos")!=-1);
    this.is_sun4  = (agt.indexOf("sunos 4")!=-1);
    this.is_sun5  = (agt.indexOf("sunos 5")!=-1);
    this.is_suni86= (this.is_sun && (agt.indexOf("i86")!=-1));
    this.is_irix  = (agt.indexOf("irix") !=-1);    // SGI
    this.is_irix5 = (agt.indexOf("irix 5") !=-1);
    this.is_irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6") !=-1));
    this.is_hpux  = (agt.indexOf("hp-ux")!=-1);
    this.is_hpux9 = (this.is_hpux && (agt.indexOf("09.")!=-1));
    this.is_hpux10= (this.is_hpux && (agt.indexOf("10.")!=-1));
    this.is_aix   = (agt.indexOf("aix") !=-1);      // IBM
    this.is_aix1  = (agt.indexOf("aix 1") !=-1);    
    this.is_aix2  = (agt.indexOf("aix 2") !=-1);    
    this.is_aix3  = (agt.indexOf("aix 3") !=-1);    
    this.is_aix4  = (agt.indexOf("aix 4") !=-1);    
    this.is_linux = (agt.indexOf("inux")!=-1);
    this.is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
    this.is_unixware = (agt.indexOf("unix_system_v")!=-1); 
    this.is_mpras    = (agt.indexOf("ncr")!=-1); 
    this.is_reliant  = (agt.indexOf("reliantunix")!=-1);
    this.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)); 
    this.is_sinix = (agt.indexOf("sinix")!=-1);
    this.is_freebsd = (agt.indexOf("freebsd")!=-1);
    this.is_bsd = (agt.indexOf("bsd")!=-1);
    this.is_unix  = ((agt.indexOf("x11")!=-1) || this.is_sun || this.is_irix || this.is_hpux || 
                 this.is_sco ||this.is_unixware || this.is_mpras || this.is_reliant || 
                 this.is_dec || this.is_sinix || this.is_aix || this.is_linux || this.is_bsd || this.is_freebsd);

    this.is_vms   = ((agt.indexOf("vax")!=-1) || (agt.indexOf("openvms")!=-1));
	
	var flashObject = new flash()
	
	//flashVersion  - property, holds the version of the Flash version installed on the current browser
	this.fVersion = flashObject.version;
}


//construct flash object
function flash() 
{
	
	//if no Flash, dontKnow becomes true
	var dontKnow = false;
	
	//eliminates any lowercase/uppercase confusions
	var agent = navigator.userAgent.toLowerCase(); 
	
	// NS3+ and Opera3+ (support plugin array):  check for Flash plugin in plugin array
	if (navigator.plugins != null && navigator.plugins.length > 0) 
	{
		var flashPlugin = navigator.plugins['Shockwave Flash'];
		if (typeof flashPlugin == 'object') 
		{ 
			if (flashPlugin.description.indexOf('10.') != -1) flashVersion = 10;
			else if (flashPlugin.description.indexOf('9.') != -1) flashVersion = 9;
			else if (flashPlugin.description.indexOf('8.') != -1) flashVersion = 8;
			else if (flashPlugin.description.indexOf('7.') != -1) flashVersion = 7;
			else if (flashPlugin.description.indexOf('6.') != -1) flashVersion = 6;
			else if (flashPlugin.description.indexOf('5.') != -1) flashVersion = 5;
			else if (flashPlugin.description.indexOf('4.') != -1) flashVersion = 4;
			else if (flashPlugin.description.indexOf('3.') != -1) flashVersion = 3;
		}
		else
			flashVersion = -1;
	}

	
	// IE4+ on Win32:  attempt to create an ActiveX object using VBScript
	else if (agent.indexOf("msie") != -1 && parseInt(navigator.appVersion) >= 4 && agent.indexOf("win")!=-1 && agent.indexOf("16bit")==-1) {
	    document.write('<scr' + 'ipt language="VBScript"\> \n');
		document.write('on error resume next \n');
		document.write('dim obFlash \n');
		document.write('set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.10") \n');
				
		document.write('if IsObject(obFlash) then \n');
		document.write('flashVersion = 10 \n');
		document.write('else set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.9") end if \n');
		
		document.write('if flashVersion < 10 and IsObject(obFlash) then \n');
		document.write('flashVersion = 9 \n');
		document.write('else set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.8") end if \n');
		
		document.write('if flashVersion < 9 and IsObject(obFlash) then \n');
		document.write('flashVersion = 8 \n');
		document.write('else set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.7") end if \n');
		
		document.write('if flashVersion < 8 and IsObject(obFlash) then \n');
		document.write('flashVersion = 7 \n');
		document.write('else set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.6") end if \n');
		
		document.write('if flashVersion < 7 and IsObject(obFlash) then \n');
		document.write('flashVersion = 6 \n');
		document.write('else set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.5") end if \n');
		
		document.write('if flashVersion < 6 and IsObject(obFlash) then \n');
		document.write('flashVersion = 5 \n');
		document.write('else set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.4") end if \n');
		
		document.write('if flashVersion < 5 and IsObject(obFlash) then \n');
		document.write('flashVersion = 4 \n');
		document.write('else set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash.3") end if \n');
		
		document.write('if flashVersion < 4 and IsObject(obFlash) then \n');
		document.write('flashVersion = 3 \n');
		document.write('end if');
		document.write('</scr' + 'ipt\> \n');
  }
		
	// WebTV 2.5 supports flash 3
	else if (agent.indexOf("webtv/2.5") != -1) flashVersion = 3;

	// older WebTV supports flash 2
	else if (agent.indexOf("webtv") != -1) flashVersion = 2;

	// Can't detect in all other cases
	else 
	{
		flashVersion = -1;
		dontKnow = true;
	}

	this.version = flashVersion;
}