// Browser plugin detector

// 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 detectPDF(redirectURL, redirectIfFound) {
	pluginFound = detectPlugin('Adobe','Acrobat'); 
	// if not found, try to detect with VisualBasic
	if(!pluginFound && detectableWithVB) {
		pluginFound = detectActiveXControl('PDF.PdfCtrl.5') || 
		              detectActiveXControl('AcroPDF.PDF');
	}
	return pluginFound;
}

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

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

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

function detectReal(redirectURL, redirectIfFound) {
	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(redirectURL, redirectIfFound) {
	pluginFound = detectPlugin('Windows Media');
	// 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>');
}