How to make :checked work on Android Browser?

I'm trying to make a form that has a list of default options, and which can also expand to show a couple of exta options. I do this with the following CSS code:

.myForm .moreOpts {display:none;}
.myForm #more:checked +*+ .moreOpts {display:block;}

with the following HTML:

<form action="#" class="myForm">
  <ul>
    <li>
      <input type="checkbox" id="pref-1" name="pref-1" value="1">
      <label for="pref-1">Foo</label>
    </li>
    <li>
      <input type="checkbox" id="pref-2" name="pref-2" value="2">
      <label for="pref-2">Bar</label>
    </li>
    <li>
      <input type="checkbox" id="more" name="more" value="true">
      <label for="more">More options</label>
      <ul class="moreOpts">
        <li>
          <input type="checkbox" id="pref-3" name="pref-3" value="3">
          <label for="pref-3">Baz</label>
        </li>
        <li>
          <input type="checkbox" id="pref-4" name="pref-4" value="3">
          <label for="pref-4">Qux</label>
        </li>
      </ul>
    </li>
  </ul>
</form>

Demo

This code works perfectly in every browser, except for Android Browser and Dolphin. I've found an article that recommends adding this "bugfix", but that only fixes my problem in Dolphin.

Is there any way to make this work for the default Android Browser too?

You can achieve this with the help of the details element. Android supports it since version 4. However, you will have to deal with IE and Firefox, but fortunatly these browser support the CSS3 pseudo states, including :checked.

Two merge these two, just use the checkbox hack in browsers that don't support details. Here's the process explained in code: http://jsfiddle.net/hF6JP/1/

EDIT: this is the final solution, putting label inside the summary resolves the problem of having a forced checkbox to toggle the options: http://jsfiddle.net/mYdsT/