JavascriptDecoder is written in javascript.
Demo: http://gosu.pl/demo/JavascriptDecode...ptDecoder.html
You can try decoding this: http://www.udm4.com/udm-resources/udm-mod-keyboard.js (ctrl + a , ctrl + c, ctrl + v)
Colorizing the code works currently only on Mozilla. Thanks for any comments / suggestions.

I have one problem. When I put the code string into
<pre id="a2"></pre>
by using:
document.getElementById("a2").innerHTML = s;
on Internet Explorer linefeeds "\n" are being removed, so all the code is showing in 1 line I tried .innerText and it worked, but then I cannot put html tags into it - the colorizing of the code doesn't work. Help me with this buggy IE !