<Sprite type="sprite_slider" resize_rect="0" >
  <BottomRect x="0" y="0" w="167" h="34" ></BottomRect>
  <BottomSprite>data/gfx/ui/options_slider_background.png</BottomSprite>
  <TopRect x="5" y="0" w="157" h="34" ></TopRect>
  <TopSprite>data/gfx/ui/options_slider_foreground.png</TopSprite>
  <Value>1</Value>
</Sprite>