<!DOCTYPE html>
<script src="resources/polyfill.js"></script>

<p>A mixed case of a shadow element and content element.</p>
<form>
    <select id="host">
        <option disabled>Please select</option>
        <optgroup label="Rank 1"></optgroup>
        <option value="hoge" selected>hoge</option>
    </select>
    <input id="submit" type="submit" value="Submit">
</form>

<script>
var host = document.getElementById('host');
var shadowRoot = host.webkitCreateShadowRoot();
shadowRoot.innerHTML = "<content></content><div style='margin: 20px'><shadow></shadow></div>"
</script>