edw!n on "wp_dropdown_pages() with parents disabled"

I wnat to use wp_dropdown_pages() the get a select with all pages within the site. But for all pages that have children, I'd like the <option> to be disabled, because these pages don't have any content. They are there just for hierachial reasons.

So

<select >
	<option class="level-0" value="2">Home</option>
	<option class="level-0" value="8">Praktisch</option>
	<option class="level-1" value="53">&nbsp;&nbsp;&nbsp;Contact & Route</option>
	<option class="level-1" value="55">  Mission</option>
	<option class="level-1" value="57">  Who is who</option>
	<option class="level-0" value="12">Schrijfcoaching</option>
	<option class="level-1" value="63">  Schrijfcoaching</option>
	<option class="level-1" value="65">  Manuscriptbeoordeling</option>
</select>

should be

<select >
	<option class="level-0" value="2" disabled>Home</option>
	<option class="level-0" value="8">Praktisch</option>
	<option class="level-1" value="53">&nbsp;&nbsp;&nbsp;Contact & Route</option>
	<option class="level-1" value="55">  Mission</option>
	<option class="level-1" value="57">  Who is who</option>
	<option class="level-0" value="12" disabled>Schrijfcoaching</option>
	<option class="level-1" value="63">  Schrijfcoaching</option>
	<option class="level-1" value="65">  Manuscriptbeoordeling</option>
</select>

Is there a way to do this?