EpokK · June 14, 2013 07:24
diff --git a/example.html b/example.html
 <html> 

 <head>
  <script src="subliminal.js"></script>
 	<script type="application/javascript">

 		function init() {
 			addSubliminal(
 				[ 'subliminal', 'message', 'affecting', 'web', 'perception', 'subconscious',':)', '$' ],
 				defaultSubliminalParameters
 			);
 		}

 	</script>
 	<title>Subliminal.JS</title>
 </head>

 <body>
 <h1><b>subliminal.js</b>: [c]overt biocomputer programming</h1>

 <b>What are <a href="http://en.wikipedia.org/wiki/Subliminal_stimuli">Subliminal Messages</a>?</b>
 <ul>
 "Subliminal stimuli, contrary to supraliminal stimuli or "above threshold", are any sensory stimuli below an individual's threshold for conscious perception. Some research has found that subliminal messages do not produce strong or lasting changes in behavior. However, a recent review of functional magnetic resonance imaging (fMRI) studies shows that subliminal stimuli activate specific regions of the brain despite participants being unaware. Visual stimuli may be quickly flashed before an individual can process them, or flashed and then masked, thereby interrupting the processing. Audio stimuli may be played below audible volumes, masked by other stimuli, or recorded backwards in a process called backmasking."
 </ul>

 </body>

 <script>
 	init();
 </script>

 </html>
diff --git a/subliminal.js b/subliminal.js
 var defaultSubliminalParameters = {
  framePeriod: 30 /* milliseconds between each frame */,
 	font: '190px Arial',
 	textcolor: "rgba(0.9,0.9,0.9,0.9)",
 	rightMargin: 200,
 	topMargin: 100,
 	displayProbability: 0.58,
 	moveProbability: 0.08,
 	messageProbability: 0.08,
 	zindex: -10000,
 };


 function addSubliminal(messages, p) {
 	var root = document.body;
 	var canvas = document.createElement('canvas');
 	canvas.setAttribute('style', 'position: fixed; pointer-events: none; z-index: ' + p.zindex);
 	root.insertBefore(canvas, root.firstChild);

 	var message = '';
 	var x = 0, y = 0;

 	function update() {
 		var width = document.body.clientWidth;
 		var height = document.body.clientHeight

 		canvas.width = width;
 		canvas.height = height;

 		var ctx = canvas.getContext("2d");

 		// Clear the screen
 		ctx.font = p.font;
 		ctx.clearRect(0,0,width,height);

 		if ((Math.random() < p.messageProbability) || (message == '')) {
 			message = messages[parseInt(Math.random() * messages.length)];
 		}
 		if ((Math.random() < p.moveProbability) || ((x == 0) && (y==0))) {
 			x = Math.random()*(width-p.rightMargin);
 			y = Math.random()*(height-p.topMargin)+p.topMargin;
 		}	
 		if (Math.random() < p.displayProbability) {
 			// Display the text in the new position
 			ctx.fillStyle = p.textcolor;
 			ctx.fillText(message, x, y);
 		}
 	}

 	if (canvas.getContext) {
 		setInterval(update, p.framePeriod)
 	}
 }
	<html>

	<head>
	<script src="subliminal.js"></script>
	<script type="application/javascript">

	function init() {
	addSubliminal(
	[ 'subliminal', 'message', 'affecting', 'web', 'perception', 'subconscious',':)', '$' ],
	defaultSubliminalParameters
	);
	}

	</script>
	<title>Subliminal.JS</title>
	</head>

	<body>
	<h1><b>subliminal.js</b>: [c]overt biocomputer programming</h1>

	<b>What are <a href="http://en.wikipedia.org/wiki/Subliminal_stimuli">Subliminal Messages</a>?</b>
	<ul>
	"Subliminal stimuli, contrary to supraliminal stimuli or "above threshold", are any sensory stimuli below an individual's threshold for conscious perception. Some research has found that subliminal messages do not produce strong or lasting changes in behavior. However, a recent review of functional magnetic resonance imaging (fMRI) studies shows that subliminal stimuli activate specific regions of the brain despite participants being unaware. Visual stimuli may be quickly flashed before an individual can process them, or flashed and then masked, thereby interrupting the processing. Audio stimuli may be played below audible volumes, masked by other stimuli, or recorded backwards in a process called backmasking."
	</ul>

	</body>

	<script>
	init();
	</script>

	</html>
	var defaultSubliminalParameters = {
	framePeriod: 30 /* milliseconds between each frame */,
	font: '190px Arial',
	textcolor: "rgba(0.9,0.9,0.9,0.9)",
	rightMargin: 200,
	topMargin: 100,
	displayProbability: 0.58,
	moveProbability: 0.08,
	messageProbability: 0.08,
	zindex: -10000,
	};


	function addSubliminal(messages, p) {
	var root = document.body;
	var canvas = document.createElement('canvas');
	canvas.setAttribute('style', 'position: fixed; pointer-events: none; z-index: ' + p.zindex);
	root.insertBefore(canvas, root.firstChild);

	var message = '';
	var x = 0, y = 0;

	function update() {
	var width = document.body.clientWidth;
	var height = document.body.clientHeight

	canvas.width = width;
	canvas.height = height;

	var ctx = canvas.getContext("2d");

	// Clear the screen
	ctx.font = p.font;
	ctx.clearRect(0,0,width,height);

	if ((Math.random() < p.messageProbability) \|\| (message == '')) {
	message = messages[parseInt(Math.random() * messages.length)];
	}
	if ((Math.random() < p.moveProbability) \|\| ((x == 0) && (y==0))) {
	x = Math.random()*(width-p.rightMargin);
	y = Math.random()*(height-p.topMargin)+p.topMargin;
	}
	if (Math.random() < p.displayProbability) {
	// Display the text in the new position
	ctx.fillStyle = p.textcolor;
	ctx.fillText(message, x, y);
	}
	}

	if (canvas.getContext) {
	setInterval(update, p.framePeriod)
	}
	}