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=grid.js"></script>
<script type="text/javascript" src="proxy.php?url=version.js"></script>
<script type="text/javascript" src="proxy.php?url=detector.js"></script>
<script type="text/javascript" src="proxy.php?url=formatinf.js"></script>
<script type="text/javascript" src="proxy.php?url=errorlevel.js"></script>
<script type="text/javascript" src="proxy.php?url=bitmat.js"></script>
<script type="text/javascript" src="proxy.php?url=datablock.js"></script>
<script type="text/javascript" src="proxy.php?url=bmparser.js"></script>
<script type="text/javascript" src="proxy.php?url=datamask.js"></script>
<script type="text/javascript" src="proxy.php?url=rsdecoder.js"></script>
<script type="text/javascript" src="proxy.php?url=gf256poly.js"></script>
<script type="text/javascript" src="proxy.php?url=gf256.js"></script>
<script type="text/javascript" src="proxy.php?url=decoder.js"></script>
<script type="text/javascript" src="proxy.php?url=qrcode.js"></script>
<script type="text/javascript" src="proxy.php?url=findpat.js"></script>
<script type="text/javascript" src="proxy.php?url=alignpat.js"></script>
<script type="text/javascript" src="proxy.php?url=databr.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.