<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title></title>
<meta http-equiv="content-type" content="text/html;charset=iso-8859-1;" />
</head>
<body>
<form action="">
<input type="checkbox" onclick="this.form.btnSubmit.disabled = !this.checked;">
Check this in order to submit
<br /><br />
<input name="btnSubmit" type="submit" value="Submit" disabled="disabled" />
</form>
</body>
</html>
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