doc = Nokogiri::HTML::Document.parse(<<-eohtml)
<html>
<head>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<form>
<input name="email" disabled="disabled" />
<input name="id" />
</form>
</body>
</html>
eohtml
p doc.css("input:disabled").count
# >> 2
# ~>
/home/kirti/.rvm/gems/ruby-2.0.0-p0/gems/nokogiri-1.5.9/lib/nokogiri/xml/node.rb:159:in
`evaluate': xmlXPathCompOpEval: function disabled not found
(RuntimeError)
# ~> from
/home/kirti/.rvm/gems/ruby-2.0.0-p0/gems/nokogiri-1.5.9/lib/nokogiri/xml/node.rb:159:in
`block in xpath'
# ~> from
/home/kirti/.rvm/gems/ruby-2.0.0-p0/gems/nokogiri-1.5.9/lib/nokogiri/xml/node.rb:150:in
`map'
# ~> from
/home/kirti/.rvm/gems/ruby-2.0.0-p0/gems/nokogiri-1.5.9/lib/nokogiri/xml/node.rb:150:in
`xpath'
# ~> from
/home/kirti/.rvm/gems/ruby-2.0.0-p0/gems/nokogiri-1.5.9/lib/nokogiri/xml/node.rb:214:in
`css'
# ~> from -:69:in `<main>'
************************
Why the errors are throwing up?
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