// initialize global variables
var detectableWithVB	= false;
var pluginFound			= false;

function canDetectPlugins() {
	if( detectableWithVB || (navigator.plugins && navigator.plugins.length > 0) ) {
		return true;
	} else {
		return false;
	}
}

function detectFlash() {
	pluginFound = detectPlugin('Shockwave','Flash');
	// if not found, try to detect with VisualBasic
	if(!pluginFound && detectableWithVB) {
		pluginFound = detectActiveXControl('ShockwaveFlash.ShockwaveFlash.1');
	}
	return pluginFound;
}

function detectDirector() {
	pluginFound = detectPlugin('Shockwave','Director');
	// if not found, try to detect with VisualBasic
	if(!pluginFound && detectableWithVB) {
		pluginFound = detectActiveXControl('SWCtl.SWCtl.1');
	}
	return pluginFound;
}

function detectQuickTime() {
	pluginFound = detectPlugin('QuickTime');
	// if not found, try to detect with VisualBasic
	if(!pluginFound && detectableWithVB) {
		pluginFound = detectQuickTimeActiveXControl();
	}
	return pluginFound;
}

function detectReal() {
	pluginFound = detectPlugin('RealPlayer');
	// if not found, try to detect with VisualBasic
	if(!pluginFound && detectableWithVB) {
		pluginFound = (detectActiveXControl('rmocx.RealPlayer G2 Control') || detectActiveXControl('RealPlayer.RealPlayer(tm) ActiveX Control (32-bit)') || detectActiveXControl('RealVideo.RealVideo(tm) ActiveX Control (32-bit)'));
	}
	return pluginFound;
}

function detectWindowsMedia() {
	pluginFound = detectPlugin('Windows Media Player');
	// if not found, try to detect with VisualBasic
	if(!pluginFound && detectableWithVB) {
		pluginFound = detectActiveXControl('MediaPlayer.MediaPlayer.1');
	}
	return pluginFound;
}

function detectPlugin() {
	// allow for multiple checks in a single pass
	var daPlugins = detectPlugin.arguments;
	// consider pluginFound to be false until proven true
	var pluginFound = false;
	// if plugins array is there and not fake
	if (navigator.plugins && navigator.plugins.length > 0) {
		var pluginsArrayLength = navigator.plugins.length;
		// for each plugin...
		for (pluginsArrayCounter=0; pluginsArrayCounter < pluginsArrayLength; pluginsArrayCounter++ ) {
			// loop through all desired names and check each against the current plugin name
			var numFound = 0;
			for(namesCounter=0; namesCounter < daPlugins.length; namesCounter++) {
				// if desired plugin name is found in either plugin name or description
				if( (navigator.plugins[pluginsArrayCounter].name.indexOf(daPlugins[namesCounter]) >= 0) || (navigator.plugins[pluginsArrayCounter].description.indexOf(daPlugins[namesCounter]) >= 0) ) {
					// this name was found
					numFound++;
				}
			}
			// now that we have checked all the required names against this one plugin,
			// if the number we found matches the total number provided then we were successful
			if(numFound == daPlugins.length) {
				pluginFound = true;
				// if we've found the plugin, we can stop looking through at the rest of the plugins
				break;
			}
		}
	}
	return pluginFound;
} // detectPlugin

// Here we write out the VBScript block for MSIE Windows
if ((navigator.userAgent.indexOf('MSIE') != -1) && (navigator.userAgent.indexOf('Win') != -1)) {
	document.writeln('<script language="VBscript">');

	document.writeln('\'do a one-time test for a version of VBScript that can handle this code');
	document.writeln('detectableWithVB = False');
	document.writeln('If ScriptEngineMajorVersion >= 2 then');
	document.writeln('  detectableWithVB = True');
	document.writeln('End If');

	document.writeln('\'this next function will detect most plugins');
	document.writeln('Function detectActiveXControl(activeXControlName)');
	document.writeln('  on error resume next');
	document.writeln('  detectActiveXControl = False');
	document.writeln('  If detectableWithVB Then');
	document.writeln('	 detectActiveXControl = IsObject(CreateObject(activeXControlName))');
	document.writeln('  End If');
	document.writeln('End Function');

	document.writeln('\'and the following function handles QuickTime');
	document.writeln('Function detectQuickTimeActiveXControl()');
	document.writeln('  on error resume next');
	document.writeln('  detectQuickTimeActiveXControl = False');
	document.writeln('  If detectableWithVB Then');
	document.writeln('	detectQuickTimeActiveXControl = False');
	document.writeln('	hasQuickTimeChecker = false');
	document.writeln('	Set hasQuickTimeChecker = CreateObject("QuickTimeCheckObject.QuickTimeCheck.1")');
	document.writeln('	If IsObject(hasQuickTimeChecker) Then');
	document.writeln('	  If hasQuickTimeChecker.IsQuickTimeAvailable(0) Then ');
	document.writeln('		detectQuickTimeActiveXControl = True');
	document.writeln('	  End If');
	document.writeln('	End If');
	document.writeln('  End If');
	document.writeln('End Function');

	document.writeln('</scr' + 'ipt>');
}

function checkForPlugins() {
	ableToDetect	= canDetectPlugins();
	sReturn			= '&name=plugin';

	if (ableToDetect) {
		sReturn += "&checkPlugin=true";

		pluginIsInstalled = detectQuickTime();
		if (pluginIsInstalled) {
			sReturn += "&QuickTime=true";
		}
		else {
			sReturn += "&QuickTime=false";
		}
		pluginIsInstalled = detectFlash();
		if (pluginIsInstalled) {
			sReturn += "&Flash=true";
		}
		else {
			sReturn += "&Flash=false";
		}
		pluginIsInstalled = detectDirector();
		if (pluginIsInstalled) {
			sReturn += "&Director=true";
		}
		else {
			sReturn += "&Director=false";
		}
		pluginIsInstalled = detectWindowsMedia();
		if (pluginIsInstalled) {
			sReturn += "&WindowsMedia=true";
		}
		else {
			sReturn += "&WindowsMedia=false";
		}
		pluginIsInstalled = detectReal();
		if (pluginIsInstalled) {
			sReturn += "&Real=true";
		}
		else {
			sReturn += "&Real=false";
		}
	}
	else {
		sReturn += "&checkPlugin=false";
	}

	return sReturn;
}