rackbar-back">theme:v-trackbar-back</option>
        <option><img src="theme:h-trackbar-thumb-normal">theme:h-trackbar-thumb-normal</option>
        <option><img src="theme:h-trackbar-thumb-hover">theme:h-trackbar-thumb-hover</option>
        <option><img src="theme:h-trackbar-thumb-pressed">theme:h-trackbar-thumb-pressed</option>
        <option><img src="theme:h-trackbar-thumb-focus">theme:h-trackbar-thumb-focus</option>
        <option><img src="theme:h-trackbar-thumb-disabled">theme:h-trackbar-thumb-dis