Steganosaurus, alternative approach

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If someone encountered http://www.steamgifts.com/discussion/NGx4a/steganography-no-vouchers, and found a short C# code and its compilation scary, that is sad.
However I do not give up so easily, and actually there are many other programmable tools which are present on your PC-s regardless of your worries, and an obvious one is the Web browser.
So here is a HTML5+JavaScript approach

<!DOCTYPE HTML>
<html>
<head>
<script type='text/javascript'>
    function loadImage() {
        var fr = new FileReader();
        fr.onload = function() {img.src = fr.result;};
        var img = document.createElement('img');
        img.onload = function() {
            var c=document.createElement('canvas');
            c.width = img.width;
            c.height = img.height;
            var ctx=c.getContext("2d");
            ctx.drawImage(img, 0, 0, img.width, img.height);
            var imgData=ctx.getImageData(0, 0, img.width, img.height);
            var pix=imgData.data;
            var code="";
            for(var i=0;i<img.width*img.height;i++)
                if((pix[i*4] & 1)==1)
                    code+=pix[i*4+2] & 1;
            document.getElementById('result').innerHTML=code;
        }
        fr.readAsDataURL(document.getElementById('imgfile').files[0]);
    }
</script>
</head>
<body>
<form><input type='file' id='imgfile' onchange='loadImage();'></form>
<div id='result'/>
</body>
</html>

The drawback is that it is longer, more complicated, and it is absolutely not sure all possible browsers will handle it (I tested with Chrome and IE10-11, those work). Suggested filename is a.html, and when IE says it restricted scripting, it should be enabled.
While it would be obvious to host this page somewhere, please do not post such links here.

In short: this is a decoder for images which contain some secret information encoded in their color channels. The linked thread explains the details.

My trusty 101 Potato and a totally random Stegosaurus are accompanying me again.

View attached image.