n>
        <option><img src="theme:h-trackbar-thumb-up-hover">theme:h-trackbar-thumb-up-hover</option>
        <option><img src="theme:h-trackbar-thumb-up-pressed">theme:h-trackbar-thumb-up-pressed</option>
        <option><img src="theme:h-trackbar-thumb-up-disabled">theme:h-trackbar-thumb-up-disabled</option>
        <option><img src="theme:v-trackbar-thumb-left-normal">theme:v-trackbar-thumb-left-normal</option>
        <option><img src="theme:v-trackbar-thumb-left-hover">theme:v-trackbar-thumb-left-hove