Copyright: Copyright 1998-2005  W3C (MIT, ERCIM, Keio), All Rights Reserved.
See http://www.w3.org/Consortium/Legal/.
Author: Aaron M. Cohen   
         File Name: layout-backgroundColor-override.smil
  Media Components: 2 JPG
 Expected Behavior: Tests background color override on media elements.
                    Show yellow background on left, green on right for 2s.
                    Then, show smile on left with red background, 
                    frown on right with green background for 2s.
                    Then, show smile on left with yellow background, 
                    frown on right with blue background for 2s.
<smil xmlns="http://www.w3.org/2005/SMIL21/Language">
           <root-layout width="640px" height="480px"/>
           <region id="left" top="0px" left="0px" width="320px" height="480px" backgroundColor="yellow"/>
           <region id="right" top="0px" left="320px" width="320px" height="480px" backgroundColor="green"/>
        <seq begin="2s">
                <img region="left" src="../images/smile.jpg" backgroundColor="red" dur="2s"/>
                <img region="right" src="../images/frown.jpg" dur="2s"/>
                <img region="left" src="../images/smile.jpg" dur="2s"/>
                <img region="right" src="../images/frown.jpg" backgroundColor="blue" dur="2s"/>