So here is something I don't quite understand. According to [1],
"input:disabled" is a quite valid CSS selector.
Given this[2]:
<html><body>
<style>input:disabled {background: #0F0; color: #F00;}</style>
<input type="text" id="greenjunk" name="greenjunk" value="nada" disabled />
<input type="text" id="name" name="name" value="Joe" />
<input type="submit" id="submit" name="submit" value="submit" />
</body></html>
Why wouldn't doc.css("input:disabled") also work? Clearly it doesn't,
but I don't know what it *should* be. (Noting that xpath would be quite
different, of course.)
[1] https://developer.mozilla.org/en-US/docs/Web/CSS/:disabled
[2] see this ugly thing at https://dl.dropboxusercontent.com/u/571329/Examples/greenjunk.html
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