title: How to find all <button> with type=submit without any name nor value attributes?
body: <p>I currently use this to disable all <code>&lt;button&gt;</code> once the form is submitted / button clicked:</p>
  
  <pre><code>$('.my-form').submit(function(){
      $(this).find('button[type=submit]').attr('disabled', 'disabled');
  });
  </code></pre>
  
  <p>But this also disables all <code>&lt;button&gt;</code> with meaningful name and value such as:</p>
  
  <pre><code>&lt;button type="submit" name="confirm" value="1" /&gt;
  &lt;button type="submit" name="confirm" value="0" /&gt;
  </code></pre>
  
  <p>Those useful values are NOT submitted because the button is disabled.</p>
  
  <p>How can I select all <code>&lt;button&gt;</code> with type=submit but without any name nor value attributes? I tried to google but only found something like <code>[attribute!='value']</code> which I was not able to combine into what I already have.</p>