JavaScript QRCode reader for HTML5 enabled browser.
2011 Lazar Laszlo  http://lazarsoft.info

Try it online: http://webqr.com

This is a port of ZXing qrcode scanner, http://code.google.com/p/zxing.

Usage:

Include the scripts in the following order:

<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fgrid.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fversion.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fdetector.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fformatinf.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Ferrorlevel.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fbitmat.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fdatablock.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fbmparser.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fdatamask.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Frsdecoder.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fgf256poly.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fgf256.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fdecoder.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fqrcode.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Ffindpat.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Falignpat.js"></script>
<script type="text/javascript" src="proxy.php?url=https%3A%2F%2Fgithub.com.%2Fdatabr.js"></script>

Set qrcode.callback to function "func(data)", where data will get the decoded information.

Decode image with: qrcode.decode(url or DataURL).
Decode from canvas with "qr-canvas" ID: qrcode.decode()

[new from 2014.01.09]
For webcam qrcode decoding (included in the test.html) you will need a browser with getUserMedia (WebRTC) capability.