mechanize:Mechanize::Form::RadioButton#[]

以下のような HTML で

<html>
<head>
<title>form test</title>
</head>
<body>

<form method="get" action="cgi/foo00.cgi" name="form1">
  <input type="radio" name="radio1" value="foo" checked="checked" />Foo
  <input type="radio" name="radio1" value="bar" />Bar
</form>

</body>
</html>
>> require 'mechanize'
=> true
>> agent = Mechanize.new
=> #<Mechanize:0xb745d604 ...
>> page = agent.get('http://127.0.0.1:8080/test13_radiobutton.html')
=> #<Mechanize::Page
  ...
>> f = page.form('form1')
=> #<Mechanize::Form
  ...
>> f.radiobuttons[0].node
=> #<Nokogiri::XML::Element:0x..fdba28892 name="input" attributes=[#<Nokogiri::XML::Attr:0x..fdba23234 name="type" value="radio">, #<Nokogiri::XML::Attr:0x..fdba2322a name="name" value="radio1">, #<Nokogiri::XML::Attr:0x..fdba23220 name="value" value="foo">, #<Nokogiri::XML::Attr:0x..fdba23216 name="checked" value="checked">]>
>> f.radiobuttons[0]['name']
=> "radio1"
>> f.radiobuttons[0]['value']
=> "foo"