<smil>
  <head>
    <layout>
	<region id="r1" title="region-test" top="0" left="0" height="75" width="250"/>
    </layout>
  </head> 
  <body>
      <img src="http://smil.nist.gov/interop1/choose.jpg"
           dur="1s" region="r1" />
  </body>
</smil>