// Flash Player Version Detection - Rev 1.5
// Detect Client Browser type
// Copyright(c) 2005-2006 Adobe Macromedia Software, LLC. All rights reserved.
var isIE  = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var isWin = (navigator.appVersion.toLowerCase().indexOf("win") != -1) ? true : false;
var isOpera = (navigator.userAgent.indexOf("Opera") != -1) ? true : false;

function ControlVersion()
{
	var version;
	var axo;
	var e;

	// NOTE : new ActiveXObject(strFoo) throws an exception if strFoo isn't in the registry

	try {
		// version will be set for 7.X or greater players
		axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");
		version = axo.GetVariable("$version");
	} catch (e) {
	}

	if (!version)
	{
		try {
			// version will be set for 6.X players only
			axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");
			
			// installed player is some revision of 6.0
			// GetVariable("$version") crashes for versions 6.0.22 through 6.0.29,
			// so we have to be careful. 
			
			// default to the first public version
			version = "WIN 6,0,21,0";

			// throws if AllowScripAccess does not exist (introduced in 6.0r47)		
			axo.AllowScriptAccess = "always";

			// safe to call for 6.0r47 or greater
			version = axo.GetVariable("$version");

		} catch (e) {
		}
	}

	if (!version)
	{
		try {
			// version will be set for 4.X or 5.X player
			axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.3");
			version = axo.GetVariable("$version");
		} catch (e) {
		}
	}

	if (!version)
	{
		try {
			// version will be set for 3.X player
			axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.3");
			version = "WIN 3,0,18,0";
		} catch (e) {
		}
	}

	if (!version)
	{
		try {
			// version will be set for 2.X player
			axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
			version = "WIN 2,0,0,11";
		} catch (e) {
			version = -1;
		}
	}
	
	return version;
}

// JavaScript helper required to detect Flash Player PlugIn version information
function GetSwfVer(){
	// NS/Opera version >= 3 check for Flash plugin in plugin array
	var flashVer = -1;
	
	if (navigator.plugins != null && navigator.plugins.length > 0) {
		if (navigator.plugins["Shockwave Flash 2.0"] || navigator.plugins["Shockwave Flash"]) {
			var swVer2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
			var flashDescription = navigator.plugins["Shockwave Flash" + swVer2].description;			
			var descArray = flashDescription.split(" ");
			var tempArrayMajor = descArray[2].split(".");
			var versionMajor = tempArrayMajor[0];
			var versionMinor = tempArrayMajor[1];
			if ( descArray[3] != "" ) {
				tempArrayMinor = descArray[3].split("r");
			} else {
				tempArrayMinor = descArray[4].split("r");
			}
			var versionRevision = tempArrayMinor[1] > 0 ? tempArrayMinor[1] : 0;
			var flashVer = versionMajor + "." + versionMinor + "." + versionRevision;
		}
	}
	// MSN/WebTV 2.6 supports Flash 4
	else if (navigator.userAgent.toLowerCase().indexOf("webtv/2.6") != -1) flashVer = 4;
	// WebTV 2.5 supports Flash 3
	else if (navigator.userAgent.toLowerCase().indexOf("webtv/2.5") != -1) flashVer = 3;
	// older WebTV supports Flash 2
	else if (navigator.userAgent.toLowerCase().indexOf("webtv") != -1) flashVer = 2;
	else if ( isIE && isWin && !isOpera ) {
		flashVer = ControlVersion();
	}	
	return flashVer;
}

// When called with reqMajorVer, reqMinorVer, reqRevision returns true if that version or greater is available
function DetectFlashVer(reqMajorVer, reqMinorVer, reqRevision)
{
	versionStr = GetSwfVer();
	if (versionStr == -1 ) {
		return false;
	} else if (versionStr != 0) {
		if(isIE && isWin && !isOpera) {
			// Given "WIN 2,0,0,11"
			tempArray         = versionStr.split(" "); 	// ["WIN", "2,0,0,11"]
			tempString        = tempArray[1];			// "2,0,0,11"
			versionArray      = tempString.split(",");	// ['2', '0', '0', '11']
		} else {
			versionArray      = versionStr.split(".");
		}
		var versionMajor      = versionArray[0];
		var versionMinor      = versionArray[1];
		var versionRevision   = versionArray[2];

        	// is the major.revision >= requested major.revision AND the minor version >= requested minor
		if (versionMajor > parseFloat(reqMajorVer)) {
			return true;
		} else if (versionMajor == parseFloat(reqMajorVer)) {
			if (versionMinor > parseFloat(reqMinorVer))
				return true;
			else if (versionMinor == parseFloat(reqMinorVer)) {
				if (versionRevision >= parseFloat(reqRevision))
					return true;
			}
		}
		return false;
	}
}


//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Funktion: prüft die Flash Version
//    Input: requiredMajorVersion, requiredMinorVersion, requiredRevision (stehen in der HTML-Seite im Kopf, damit sie leicht zu 
//			 finden und ändern sind)
//   Output: var flash_message:String; true/false
// erstellt: 11.03.09
// geändert: 17.04.09
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
function checkFlash() {
	// Flash Detection starten
	if (DetectFlashVer(requiredMajorVersion, requiredMinorVersion, requiredRevision)) {
		// Flash Detection war erfolgreich
		flash_message = "Version "+versionStr+" ist installiert!";
		return true;
	}
	else {
		// die vorhandene Flash Version ist zu niedrig
		if (versionStr != -1) {
			flash_message = "Version "+versionStr+" ist installiert. Sie benötigen mindestens Version "+requiredMajorVersion+"."+requiredMinorVersion+"."+requiredRevision+"!";
			return false;
		}
		// es wurde keine Flash Version gefunden
		else {
			flash_message = "ist nicht installiert!";
			return false;
		}
	}
}


//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Funktion: überprüft die Browserart und Version 
//    Input: /
//   Output: var browser_message:String, true/false
// erstellt: 10.03.09
// geändert: 17.04.09
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
function checkBrowser()
{
  	var v3 = 0; 
  	var op = 0; 
  	var ie4 = 0;
  	var ie5 = 0; 
  	var nn4 = 0; 
  	var nn6 = 0; 
  	var isMac = 0; 
  	var aol = 0;
   
  	if (document.images) 
	{
    	if (navigator.userAgent.indexOf("Opera") != -1) 
		{
        	op = 1;
    	} 
		else 
		{
        	if (navigator.userAgent.indexOf("AOL") != -1) 
			{
            	aol = 1;
        	} 
			else 
			{
            	ie4 = (document.all && !document.getElementById);
				nn4 = (document.layers);
				ie5 = (document.all && document.getElementById);
				nn6 = (document.addEventListener);
        	}
    	}
  	} 
	else 
	{
    	v3 = 1;	
    }

  	if (navigator.userAgent.indexOf("Mac") != -1) 
	{
    	isMac = 1;
  	}

	// ab hier erfolgen die Aufrufe
  	if (op) 
	{
    	browser_message = "Sie verwenden den Browser Opera. Sollte es Probleme mit der Navigation im Lernmodul kommen, benutzen Sie bitte den Internet Explorer oder Firefox!";
		return true;
  	}
	
  	if (ie4) 
	{
		browser_message = "Sie verwenden den Internet Explorer 4. Um das Lernmodul starten zu können, benötigen Sie mindestens Version 5.5!";
		return false;
  	} 
	
  	if (ie5) 
	{ 
    	if (isMac == 1) 
		{ 
	  		browser_message = "Der Internet Explorer wird für den Mac nicht unterstützt. Um das Lernmodul starten zu können, benutzen Sie bitte den Internet Explorer oder Firefox!";
			return false;
		}	
		else 
		{
			browser_message = "Internet Explorer für Windows Version 5 oder höher erkannt!";
			return true;
		}
  	} 
	
  	if (nn4) 
	{
    	browser_message = "Sie benutzen Netscape 4. Um das Lernmodul starten zu können, benötigen Sie mindestens Version 7.0!";
		return false;
  	} 
 	
	if (nn6) 
	{ 
		browser_message = "basierend auf der Gecko-Engine erkannt!";
    	return true;
  	}
	
  	if (aol) 
	{ 
		browser_message = "AOL Browser nicht getestet!";
		return true;
  	}
	
  	if (v3) 
	{ 
    	browser_message = "veraltet. Um das Lernmodul starten zu können, benötigen Sie eine neuere Version des Internet Explorers oder Firefox";
		return false;
  	}
}


//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Funktion: prüft ob die Frames "Inhalt" und "blindFrame" existieren
//    Input: /
//   Output: true/false
// erstellt: 11.03.09
// geändert: 17.04.09
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
function checkTopFrameset() {
	if (top.document.getElementById("Inhalt") && top.document.getElementById("blindFrame")) {
		return true;		// die erforderlichen Frames existieren
	}
	else {
		return false;		// Frameset wurde nicht korrekt geladen
	}
}