// Flash Player Version Detection - Rev 1.6
// Detect Client Browser type
// Copyright(c) 2005-2006 Adobe Macromedia Software, LLC. All rights reserved.

// Converted to a class by Gareth Farrington
var DetectFlash = DiggClass.create({
	init: function()
	{
		this.isIE  = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
		this.isWin = (navigator.appVersion.toLowerCase().indexOf("win") != -1) ? true : false;
		this.isOpera = (navigator.userAgent.indexOf("Opera") != -1) ? true : false;
	},

	controlVersion: function()
	{
		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
	swfVersion: function(){
		// 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];
				var versionRevision = descArray[3];
				if (versionRevision == "") {
					versionRevision = descArray[4];
				}
				if (versionRevision[0] == "d") {
					versionRevision = versionRevision.substring(1);
				} else if (versionRevision[0] == "r") {
					versionRevision = versionRevision.substring(1);
					if (versionRevision.indexOf("d") > 0) {
						versionRevision = versionRevision.substring(0, versionRevision.indexOf("d"));
					}
				}
				var flashVer = versionMajor + "." + versionMinor + "." + versionRevision;
				//alert("flashVer="+flashVer);
			}
		}
		// 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 ( this.isIE && this.isWin && !this.isOpera ) { flashVer = this.controlVersion(); }	
		
		return flashVer;
	},

	// When called with reqMajorVer, reqMinorVer, reqRevision returns true if that version or greater is available
	flashVersion: function(reqMajorVer, reqMinorVer, reqRevision)
	{
		versionStr = this.swfVersion();
		if (versionStr == -1 ) {
			return false;
		}
		else if (versionStr != 0) {
			if(this.isIE && this.isWin && !this.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];

			return versionArray[0] + '.' + versionArray[1] + '.' + versionArray[2];
		}
	}
});