comparison core.js @ 905:b64ddb277eb0

Merge from the default branch

+/**
+ * core.js
+ * 
+ * Main script to run, calls all other core functions and manages loading/store to backend.
+ * Also contains all global variables.
+ */
+
+/* create the web audio API context and store in audioContext*/
+var audioContext; // Hold the browser web audio API
+var projectXML; // Hold the parsed setup XML
+var popup; // Hold the interfacePopup object
+var testState;
+var currentState; // Keep track of the current state (pre/post test, which test, final test? first test?)
+var currentTrackOrder = []; // Hold the current XML tracks in their (randomised) order
+var audioEngineContext; // The custome AudioEngine object
+var projectReturn; // Hold the URL for the return
+
+
+// Add a prototype to the bufferSourceNode to reference to the audioObject holding it
+AudioBufferSourceNode.prototype.owner = undefined;
+
+window.onload = function() {
+	// Function called once the browser has loaded all files.
+	// This should perform any initial commands such as structure / loading documents
+	
+	// Create a web audio API context
+	// Fixed for cross-browser support
+	var AudioContext = window.AudioContext || window.webkitAudioContext;
+	audioContext = new AudioContext;
+	
+	// Create test state
+	testState = new stateMachine();
+	
+	// Create the audio engine object
+	audioEngineContext = new AudioEngine();
+	
+	// Create the popup interface object
+	popup = new interfacePopup();
+};
+
+function interfacePopup() {
+	// Creates an object to manage the popup
+	this.popup = null;
+	this.popupContent = null;
+	this.popupButton = null;
+	this.popupOptions = null;
+	this.currentIndex = null;
+	this.responses = null;
+	this.createPopup = function(){
+		// Create popup window interface
+		var insertPoint = document.getElementById("topLevelBody");
+		var blank = document.createElement('div');
+		blank.className = 'testHalt';
+		
+		this.popup = document.createElement('div');
+		this.popup.id = 'popupHolder';
+		this.popup.className = 'popupHolder';
+		this.popup.style.position = 'absolute';
+		this.popup.style.left = (window.innerWidth/2)-250 + 'px';
+		this.popup.style.top = (window.innerHeight/2)-125 + 'px';
+		
+		this.popupContent = document.createElement('div');
+		this.popupContent.id = 'popupContent';
+		this.popupContent.style.marginTop = '25px';
+		this.popupContent.align = 'center';
+		this.popup.appendChild(this.popupContent);
+		
+		this.popupButton = document.createElement('button');
+		this.popupButton.className = 'popupButton';
+		this.popupButton.innerHTML = 'Next';
+		this.popupButton.onclick = function(){popup.buttonClicked();};
+		insertPoint.appendChild(this.popup);
+		insertPoint.appendChild(blank);
+	};
+	
+	this.showPopup = function(){
+		if (this.popup == null || this.popup == undefined) {
+			this.createPopup();
+		}
+		this.popup.style.zIndex = 3;
+		this.popup.style.visibility = 'visible';
+		var blank = document.getElementsByClassName('testHalt')[0];
+		blank.style.zIndex = 2;
+		blank.style.visibility = 'visible';
+	};
+	
+	this.hidePopup = function(){
+		this.popup.style.zIndex = -1;
+		this.popup.style.visibility = 'hidden';
+		var blank = document.getElementsByClassName('testHalt')[0];
+		blank.style.zIndex = -2;
+		blank.style.visibility = 'hidden';
+	};
+	
+	this.postNode = function() {
+		// This will take the node from the popupOptions and display it
+		var node = this.popupOptions[this.currentIndex];
+		this.popupContent.innerHTML = null;
+		if (node.nodeName == 'statement') {
+			var span = document.createElement('span');
+			span.textContent = node.textContent;
+			this.popupContent.appendChild(span);
+		} else if (node.nodeName == 'question') {
+			var span = document.createElement('span');
+			span.textContent = node.textContent;
+			var textArea = document.createElement('textarea');
+			var br = document.createElement('br');
+			this.popupContent.appendChild(span);
+			this.popupContent.appendChild(br);
+			this.popupContent.appendChild(textArea);
+			this.popupContent.childNodes[2].focus();
+		}
+		this.popupContent.appendChild(this.popupButton);
+	};
+	
+	this.initState = function(node) {
+		//Call this with your preTest and postTest nodes when needed to
+		// initialise the popup procedure.
+		this.popupOptions = $(node).children();
+		if (this.popupOptions.length > 0) {
+			if (node.nodeName == 'preTest' || node.nodeName == 'PreTest') {
+				this.responses = document.createElement('PreTest');
+			} else if (node.nodeName == 'postTest' || node.nodeName == 'PostTest') {
+				this.responses = document.createElement('PostTest');
+			} else {
+				console.log ('WARNING - popup node neither pre or post!');
+				this.responses = document.createElement('responses');
+			}
+			this.currentIndex = 0;
+			this.showPopup();
+			this.postNode();
+		}
+	};
+	
+	this.buttonClicked = function() {
+		// Each time the popup button is clicked!
+		var node = this.popupOptions[this.currentIndex];
+		if (node.nodeName == 'question') {
+			// Must extract the question data
+			var mandatory = node.attributes['mandatory'];
+			if (mandatory == undefined) {
+				mandatory = false;
+			} else {
+				if (mandatory.value == 'true'){mandatory = true;}
+				else {mandatory = false;}
+			}
+			var textArea = $(popup.popupContent).find('textarea')[0];
+			if (mandatory == true && textArea.value.length == 0) {
+				alert('This question is mandatory');
+				return;
+			} else {
+				// Save the text content
+				var hold = document.createElement('comment');
+				hold.id = node.attributes['id'].value;
+				hold.innerHTML = textArea.value;
+				console.log("Question: "+ node.textContent);
+				console.log("Question Response: "+ textArea.value);
+				this.responses.appendChild(hold);
+			}
+		}
+		this.currentIndex++;
+		if (this.currentIndex < this.popupOptions.length) {
+			this.postNode();
+		} else {
+			// Reached the end of the popupOptions
+			this.hidePopup();
+			if (this.responses.nodeName == testState.stateResults[testState.stateIndex].nodeName) {
+				testState.stateResults[testState.stateIndex] = this.responses;
+			} else {
+				testState.stateResults[testState.stateIndex].appendChild(this.responses);
+			}
+			advanceState();
+		}
+	};
+}
+
+function advanceState()
+{
+	// Just for complete clarity
+	testState.advanceState();
+}
+
+function stateMachine()
+{
+	// Object prototype for tracking and managing the test state
+	this.stateMap = [];
+	this.stateIndex = null;
+	this.currentStateMap = [];
+	this.currentIndex = null;
+	this.currentTestId = 0;
+	this.stateResults = [];
+	this.timerCallBackHolders = null;
+	this.initialise = function(){
+		if (this.stateMap.length > 0) {
+			if(this.stateIndex != null) {
+				console.log('NOTE - State already initialise');
+			}
+			this.stateIndex = -1;
+			var that = this;
+			for (var id=0; id<this.stateMap.length; id++){
+				var name = this.stateMap[id].nodeName;
+				var obj = document.createElement(name);
+				if (name == "audioHolder") {
+					obj.id = this.stateMap[id].id;
+				}
+				this.stateResults.push(obj);
+			}
+		} else {
+			conolse.log('FATAL - StateMap not correctly constructed. EMPTY_STATE_MAP');
+		}
+	};
+	this.advanceState = function(){
+		if (this.stateIndex == null) {
+			this.initialise();
+		}
+		if (this.stateIndex == -1) {
+			console.log('Starting test...');
+		}
+		if (this.currentIndex == null){
+			if (this.currentStateMap.nodeName == "audioHolder") {
+				// Save current page
+				this.testPageCompleted(this.stateResults[this.stateIndex],this.currentStateMap,this.currentTestId);
+				this.currentTestId++;
+			}
+			this.stateIndex++;
+			if (this.stateIndex >= this.stateMap.length) {
+				console.log('Test Completed');
+				createProjectSave(projectReturn);
+			} else {
+				this.currentStateMap = this.stateMap[this.stateIndex];
+				if (this.currentStateMap.nodeName == "audioHolder") {
+					console.log('Loading test page');
+					loadTest(this.currentStateMap);
+					this.initialiseInnerState(this.currentStateMap);
+				} else if (this.currentStateMap.nodeName == "PreTest" || this.currentStateMap.nodeName == "PostTest") {
+					if (this.currentStateMap.childElementCount >= 1) {
+						popup.initState(this.currentStateMap);
+					} else {
+						this.advanceState();
+					}
+				} else {
+					this.advanceState();
+				}
+			}
+		} else {
+			this.advanceInnerState();
+		}
+	};
+	
+	this.testPageCompleted = function(store, testXML, testId) {
+		// Function called each time a test page has been completed
+		// Can be used to over-rule default behaviour
+		
+		pageXMLSave(store, testXML, testId);
+	}
+	
+	this.initialiseInnerState = function(testXML) {
+		// Parses the received testXML for pre and post test options
+		this.currentStateMap = [];
+		var preTest = $(testXML).find('PreTest')[0];
+		var postTest = $(testXML).find('PostTest')[0];
+		if (preTest == undefined) {preTest = document.createElement("preTest");}
+		if (postTest == undefined){postTest= document.createElement("postTest");}
+		this.currentStateMap.push(preTest);
+		this.currentStateMap.push(testXML);
+		this.currentStateMap.push(postTest);
+		this.currentIndex = -1;
+		this.advanceInnerState();
+	}
+	
+	this.advanceInnerState = function() {
+		this.currentIndex++;
+		if (this.currentIndex >= this.currentStateMap.length) {
+			this.currentIndex = null;
+			this.currentStateMap = this.stateMap[this.stateIndex];
+			this.advanceState();
+		} else {
+			if (this.currentStateMap[this.currentIndex].nodeName == "audioHolder") {
+				console.log("Loading test page"+this.currentTestId);
+			} else if (this.currentStateMap[this.currentIndex].nodeName == "PreTest") {
+				popup.initState(this.currentStateMap[this.currentIndex]);
+			} else if (this.currentStateMap[this.currentIndex].nodeName == "PostTest") {
+				popup.initState(this.currentStateMap[this.currentIndex]);
+			} else {
+				this.advanceInnerState();
+			}
+		}
+	}
+	
+	this.previousState = function(){};
+}
+
+function testEnded(testId)
+{
+	pageXMLSave(testId);
+	if (testXMLSetups.length-1 > testId)
+	{
+		// Yes we have another test to perform
+		testId = (Number(testId)+1);
+		currentState = 'testRun-'+testId;
+		loadTest(testId);
+	} else {
+		console.log('Testing Completed!');
+		currentState = 'postTest';
+		// Check for any post tests
+		var xmlSetup = projectXML.find('setup');
+		var postTest = xmlSetup.find('PostTest')[0];
+		popup.initState(postTest);
+	}
+}
+
+function loadProjectSpec(url) {
+	// Load the project document from the given URL, decode the XML and instruct audioEngine to get audio data
+	// If url is null, request client to upload project XML document
+	var r = new XMLHttpRequest();
+	r.open('GET',url,true);
+	r.onload = function() {
+		loadProjectSpecCallback(r.response);
+	};
+	r.send();
+};
+
+function loadProjectSpecCallback(response) {
+	// Function called after asynchronous download of XML project specification
+	var decode = $.parseXML(response);
+	projectXML = $(decode);
+	
+	// Now extract the setup tag
+	var xmlSetup = projectXML.find('setup');
+	// Detect the interface to use and load the relevant javascripts.
+	var interfaceType = xmlSetup[0].attributes['interface'];
+	var interfaceJS = document.createElement('script');
+	interfaceJS.setAttribute("type","text/javascript");
+	if (interfaceType.value == 'APE') {
+		interfaceJS.setAttribute("src","ape.js");
+		
+		// APE comes with a css file
+		var css = document.createElement('link');
+		css.rel = 'stylesheet';
+		css.type = 'text/css';
+		css.href = 'ape.css';
+		
+		document.getElementsByTagName("head")[0].appendChild(css);
+	}
+	document.getElementsByTagName("head")[0].appendChild(interfaceJS);
+	
+	// Define window callbacks for interface
+	window.onresize = function(event){resizeWindow(event);};
+}
+
+function createProjectSave(destURL) {
+	// Save the data from interface into XML and send to destURL
+	// If destURL is null then download XML in client
+	// Now time to render file locally
+	var xmlDoc = interfaceXMLSave();
+	var parent = document.createElement("div");
+	parent.appendChild(xmlDoc);
+	var file = [parent.innerHTML];
+	if (destURL == "null" || destURL == undefined) {
+		var bb = new Blob(file,{type : 'application/xml'});
+		var dnlk = window.URL.createObjectURL(bb);
+		var a = document.createElement("a");
+		a.hidden = '';
+		a.href = dnlk;
+		a.download = "save.xml";
+		a.textContent = "Save File";
+		
+		var submitDiv = document.getElementById('download-point');
+		submitDiv.appendChild(a);
+		popup.showPopup();
+		popup.popupContent.innerHTML = null;
+		popup.popupContent.appendChild(submitDiv)
+	} else {
+		var xmlhttp = new XMLHttpRequest;
+		xmlhttp.open("POST",destURL,true);
+		xmlhttp.setRequestHeader('Content-Type', 'text/xml');
+		xmlhttp.onerror = function(){
+			console.log('Error saving file to server! Presenting download locally');
+			createProjectSave(null);
+		};
+		xmlhttp.onreadystatechange  = function() {
+			console.log(xmlhttp.status);
+			if (xmlhttp.status != 200 && xmlhttp.readyState == 4) {
+				createProjectSave(null);
+			}
+		};
+		xmlhttp.send(file);
+	}
+	return submitDiv;
+}
+
+// Only other global function which must be defined in the interface class. Determines how to create the XML document.
+function interfaceXMLSave(){
+	// Create the XML string to be exported with results
+	var xmlDoc = document.createElement("BrowserEvaluationResult");
+	xmlDoc.appendChild(returnDateNode());
+	for (var i=0; i<testState.stateResults.length; i++)
+	{
+		xmlDoc.appendChild(testState.stateResults[i]);
+	}
+	
+	return xmlDoc;
+}
+
+function AudioEngine() {
+	
+	// Create two output paths, the main outputGain and fooGain.
+	// Output gain is default to 1 and any items for playback route here
+	// Foo gain is used for analysis to ensure paths get processed, but are not heard
+	// because web audio will optimise and any route which does not go to the destination gets ignored.
+	this.outputGain = audioContext.createGain();
+	this.fooGain = audioContext.createGain();
+	this.fooGain.gain = 0;
+	
+	// Use this to detect playback state: 0 - stopped, 1 - playing
+	this.status = 0;
+	this.audioObjectsReady = false;
+	
+	// Connect both gains to output
+	this.outputGain.connect(audioContext.destination);
+	this.fooGain.connect(audioContext.destination);
+	
+	// Create the timer Object
+	this.timer = new timer();
+	// Create session metrics
+	this.metric = new sessionMetrics(this);
+	
+	this.loopPlayback = false;
+	
+	// Create store for new audioObjects
+	this.audioObjects = [];
+	
+	this.play = function() {
+		// Start the timer and set the audioEngine state to playing (1)
+		if (this.status == 0) {
+			// Check if all audioObjects are ready
+			if (this.audioObjectsReady == false) {
+				this.audioObjectsReady = this.checkAllReady();
+			}
+			if (this.audioObjectsReady == true) {
+				this.timer.startTest();
+				if (this.loopPlayback) {
+					for(var i=0; i<this.audioObjects.length; i++) {
+						this.audioObjects[i].play(this.timer.getTestTime()+1);
+					}
+				}
+				this.status = 1;
+			}
+		}
+	};
+	
+	this.stop = function() {
+		// Send stop and reset command to all playback buffers and set audioEngine state to stopped (1)
+		if (this.status == 1) {
+			for (var i=0; i<this.audioObjects.length; i++)
+			{
+				this.audioObjects[i].stop();
+			}
+			this.status = 0;
+		}
+	};
+	
+	
+	this.newTrack = function(url) {
+		// Pull data from given URL into new audio buffer
+		// URLs must either be from the same source OR be setup to 'Access-Control-Allow-Origin'
+		
+		// Create the audioObject with ID of the new track length;
+		audioObjectId = this.audioObjects.length;
+		this.audioObjects[audioObjectId] = new audioObject(audioObjectId);
+
+		// AudioObject will get track itself.
+		this.audioObjects[audioObjectId].constructTrack(url);
+	};
+	
+	this.newTestPage = function() {
+		this.state = 0;
+		this.audioObjectsReady = false;
+		this.metric.reset();
+		this.audioObjects = [];
+	};
+	
+	this.checkAllPlayed = function() {
+		arr = [];
+		for (var id=0; id<this.audioObjects.length; id++) {
+			if (this.audioObjects[id].metric.wasListenedTo == false) {
+				arr.push(this.audioObjects[id].id);
+			}
+		}
+		return arr;
+	};
+	
+	this.checkAllReady = function() {
+		var ready = true;
+		for (var i=0; i<this.audioObjects.length; i++) {
+			if (this.audioObjects[i].state == 0) {
+				// Track not ready
+				console.log('WAIT -- audioObject '+i+' not ready yet!');
+				ready = false;
+			};
+		}
+		return ready;
+	};
+	
+}
+
+function audioObject(id) {
+	// The main buffer object with common control nodes to the AudioEngine
+	
+	this.id = id;
+	this.state = 0; // 0 - no data, 1 - ready
+	this.url = null; // Hold the URL given for the output back to the results.
+	this.metric = new metricTracker(this);
+	
+	// Create a buffer and external gain control to allow internal patching of effects and volume leveling.
+	this.bufferNode = undefined;
+	this.outputGain = audioContext.createGain();
+	
+	// Default output gain to be zero
+	this.outputGain.gain.value = 0.0;
+	
+	// Connect buffer to the audio graph
+	this.outputGain.connect(audioEngineContext.outputGain);
+	
+	// the audiobuffer is not designed for multi-start playback
+	// When stopeed, the buffer node is deleted and recreated with the stored buffer.
+	this.buffer;
+    
+	this.loopStart = function() {
+		this.outputGain.gain.value = 1.0;
+		this.metric.startListening(audioEngineContext.timer.getTestTime());
+	}
+	
+	this.loopStop = function() {
+		if (this.outputGain.gain.value != 0.0) {
+			this.outputGain.gain.value = 0.0;
+			this.metric.stopListening(audioEngineContext.timer.getTestTime());
+		}
+	}
+	
+	this.play = function(startTime) {
+		this.bufferNode = audioContext.createBufferSource();
+		this.bufferNode.owner = this;
+		this.bufferNode.connect(this.outputGain);
+		this.bufferNode.buffer = this.buffer;
+		this.bufferNode.loop = audioEngineContext.loopPlayback;
+		this.bufferNode.onended = function() {
+			// Safari does not like using 'this' to reference the calling object!
+			event.srcElement.owner.metric.stopListening(audioEngineContext.timer.getTestTime());
+		};
+		if (this.bufferNode.loop == false) {
+			this.metric.startListening(audioEngineContext.timer.getTestTime());
+		}
+		this.bufferNode.start(startTime);
+	};
+	
+	this.stop = function() {
+		if (this.bufferNode != undefined)
+		{
+			this.bufferNode.stop(0);
+			this.bufferNode = undefined;
+			this.metric.stopListening(audioEngineContext.timer.getTestTime());
+		}
+	};
+	
+	this.getCurrentPosition = function() {
+		var time = audioEngineContext.timer.getTestTime();
+		if (this.bufferNode != undefined) {
+			if (this.bufferNode.loop == true) {
+				if (audioEngineContext.status  == 1) {
+					return time%this.buffer.duration;
+				} else {
+					return 0;
+				}
+			} else {
+				if (this.metric.listenHold) {
+					return time - this.metric.listenStart;
+				} else {
+					return 0;
+				}
+			}
+		} else {
+			return 0;
+		}
+	};
+
+	this.constructTrack = function(url) {
+		var request = new XMLHttpRequest();
+		this.url = url;
+		request.open('GET',url,true);
+		request.responseType = 'arraybuffer';
+		
+		var audioObj = this;
+		
+		// Create callback to decode the data asynchronously
+		request.onloadend = function() {
+			audioContext.decodeAudioData(request.response, function(decodedData) {
+				audioObj.buffer = decodedData;
+				audioObj.state = 1;
+			}, function(){
+				// Should only be called if there was an error, but sometimes gets called continuously
+				// Check here if the error is genuine
+				if (audioObj.state == 0 || audioObj.buffer == undefined) {
+					// Genuine error
+					console.log('FATAL - Error loading buffer on '+audioObj.id);
+				}
+			});
+		};
+		request.send();
+	};
+	
+}
+
+function timer()
+{
+	/* Timer object used in audioEngine to keep track of session timings
+	 * Uses the timer of the web audio API, so sample resolution
+	 */
+	this.testStarted = false;
+	this.testStartTime = 0;
+	this.testDuration = 0;
+	this.minimumTestTime = 0; // No minimum test time
+	this.startTest = function()
+	{
+		if (this.testStarted == false)
+		{
+			this.testStartTime = audioContext.currentTime;
+			this.testStarted = true;
+			this.updateTestTime();
+			audioEngineContext.metric.initialiseTest();
+		}
+	};
+	this.stopTest = function()
+	{
+		if (this.testStarted)
+		{
+			this.testDuration = this.getTestTime();
+			this.testStarted = false;
+		} else {
+			console.log('ERR: Test tried to end before beginning');
+		}
+	};
+	this.updateTestTime = function()
+	{
+		if (this.testStarted)
+		{
+			this.testDuration = audioContext.currentTime - this.testStartTime;
+		}
+	};
+	this.getTestTime = function()
+	{
+		this.updateTestTime();
+		return this.testDuration;
+	};
+}
+
+function sessionMetrics(engine)
+{
+	/* Used by audioEngine to link to audioObjects to minimise the timer call timers;
+	 */
+	this.engine = engine;
+	this.lastClicked = -1;
+	this.data = -1;
+	this.reset = function() {
+		this.lastClicked = -1;
+		this.data = -1;
+	};
+	this.initialiseTest = function(){};
+}
+
+function metricTracker(caller)
+{
+	/* Custom object to track and collect metric data
+	 * Used only inside the audioObjects object.
+	 */
+	
+	this.listenedTimer = 0;
+	this.listenStart = 0;
+	this.listenHold = false;
+	this.initialPosition = -1;
+	this.movementTracker = [];
+	this.listenTracker =[];
+	this.wasListenedTo = false;
+	this.wasMoved = false;
+	this.hasComments = false;
+	this.parent = caller;
+	
+	this.initialised = function(position)
+	{
+		if (this.initialPosition == -1) {
+			this.initialPosition = position;
+		}
+	};
+	
+	this.moved = function(time,position)
+	{
+		this.wasMoved = true;
+		this.movementTracker[this.movementTracker.length] = [time, position];
+	};
+	
+	this.startListening = function(time)
+	{
+		if (this.listenHold == false)
+		{
+			this.wasListenedTo = true;
+			this.listenStart = time;
+			this.listenHold = true;
+			
+			var evnt = document.createElement('event');
+			var testTime = document.createElement('testTime');
+			testTime.setAttribute('start',time);
+			var bufferTime = document.createElement('bufferTime');
+			bufferTime.setAttribute('start',this.parent.getCurrentPosition());
+			evnt.appendChild(testTime);
+			evnt.appendChild(bufferTime);
+			this.listenTracker.push(evnt);
+			
+			console.log('slider ' + this.parent.id + ' played (' + time + ')'); // DEBUG/SAFETY: show played slider id
+		}
+	};
+	
+	this.stopListening = function(time)
+	{
+		if (this.listenHold == true)
+		{
+			var diff = time - this.listenStart;
+			this.listenedTimer += (diff);
+			this.listenStart = 0;
+			this.listenHold = false;
+			
+			var evnt = this.listenTracker[this.listenTracker.length-1];
+			var testTime = evnt.getElementsByTagName('testTime')[0];
+			var bufferTime = evnt.getElementsByTagName('bufferTime')[0];
+			testTime.setAttribute('stop',time);
+			bufferTime.setAttribute('stop',this.parent.getCurrentPosition());
+			console.log('slider ' + this.parent.id + ' played for (' + diff + ')'); // DEBUG/SAFETY: show played slider id
+		}
+	};
+}
+
+function randomiseOrder(input)
+{
+	// This takes an array of information and randomises the order
+	var N = input.length;
+	var K = N;
+	var holdArr = [];
+	for (var n=0; n<N; n++)
+	{
+		// First pick a random number
+		var r = Math.random();
+		// Multiply and floor by the number of elements left
+		r = Math.floor(r*input.length);
+		// Pick out that element and delete from the array
+		holdArr.push(input.splice(r,1)[0]);
+	}
+	return holdArr;
+}
+
+function returnDateNode()
+{
+	// Create an XML Node for the Date and Time a test was conducted
+	// Structure is
+	// <datetime> 
+	//	<date year="##" month="##" day="##">DD/MM/YY</date>
+	//	<time hour="##" minute="##" sec="##">HH:MM:SS</time>
+	// </datetime>
+	var dateTime = new Date();
+	var year = document.createAttribute('year');
+	var month = document.createAttribute('month');
+	var day = document.createAttribute('day');
+	var hour = document.createAttribute('hour');
+	var minute = document.createAttribute('minute');
+	var secs = document.createAttribute('secs');
+	
+	year.nodeValue = dateTime.getFullYear();
+	month.nodeValue = dateTime.getMonth()+1;
+	day.nodeValue = dateTime.getDate();
+	hour.nodeValue = dateTime.getHours();
+	minute.nodeValue = dateTime.getMinutes();
+	secs.nodeValue = dateTime.getSeconds();
+	
+	var hold = document.createElement("datetime");
+	var date = document.createElement("date");
+	date.textContent = year.nodeValue+'/'+month.nodeValue+'/'+day.nodeValue;
+	var time = document.createElement("time");
+	time.textContent = hour.nodeValue+':'+minute.nodeValue+':'+secs.nodeValue;
+	
+	date.setAttributeNode(year);
+	date.setAttributeNode(month);
+	date.setAttributeNode(day);
+	time.setAttributeNode(hour);
+	time.setAttributeNode(minute);
+	time.setAttributeNode(secs);
+	
+	hold.appendChild(date);
+	hold.appendChild(time);
+	return hold
+	
+}
+
+function testWaitIndicator() {
+	if (audioEngineContext.checkAllReady() == false) {
+		var hold = document.createElement("div");
+		hold.id = "testWaitIndicator";
+		hold.className = "indicator-box";
+		var span = document.createElement("span");
+		span.textContent = "Please wait! Elements still loading";
+		hold.appendChild(span);
+		var body = document.getElementsByTagName('body')[0];
+		body.appendChild(hold);
+		testWaitTimerIntervalHolder = setInterval(function(){
+			var ready = audioEngineContext.checkAllReady();
+			if (ready) {
+				var elem = document.getElementById('testWaitIndicator');
+				var body = document.getElementsByTagName('body')[0];
+				body.removeChild(elem);
+				clearInterval(testWaitTimerIntervalHolder);
+			}
+		},500,false);
+	}
+}
+
+var testWaitTimerIntervalHolder = null;