mechanize：Mechanize::Form::ImageButton#query_value

everyday Ruby

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="image" src="foo1.png" name="image1" />
  <input type="image" src="foo2.png" name="image2" />
</form>

</body>
</html>
>> require 'mechanize'
=> true
>> agent = Mechanize.new
=> #<Mechanize:0xb74ca538 ...
>> page = agent.get('http://127.0.0.1:8080/test19_form.html')
=> #<Mechanize::Page
  ...
>> f = page.form('form1')
=> #<Mechanize::Form
  ...
>> f.buttons[0].query_value
=> [["image1", ""], ["image1.x", "0"], ["image1.y", "0"]]
>> f.buttons[1].query_value
=> [["image2", ""], ["image2.x", "0"], ["image2.y", "0"]]