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CORION / WWW-Mechanize-Firefox-0.73 / t / 50-tick.html 
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
<title>50-click.html</title>
</head>
<body>
<form name="foo" id="foo" action="51-mech-submit.html">
<!-- If the form action points to the same page, clicking the unnamed button
     raises no events in FF? -->
Checked 1 :         <input type="checkbox" checked="checked" id="prechecked_1" name="prechecked" value="1"><br>
Checked (no value): <input type="checkbox" checked="checked" id="prechecked_2" name="prechecked"><br>
Checked 3 :         <input type="checkbox" checked="checked" id="prechecked_3" name="prechecked" value="3"><br>
Unchecked 1:          <input type="checkbox" id="unchecked_1" name="unchecked" value="1"><br>
Unchecked (no value): <input type="checkbox" id="unchecked_2" name="unchecked"><br>
Unchecked 3:          <input type="checkbox" id="unchecked_3" name="unchecked" value="3"><br>
</form>
</body>
</html>