    <!--
                Copyright: Copyright 1998-2001 W3C (MIT, INRIA, Keio), All Rights Reserved.
    See http://www.w3.org/Consortium/Legal/.
    Author: Aaron M. Cohen
             File Name: layout-z-index3.smil
      Media Components: 1 JPG
     Expected Behavior: Tests z-index lexical order rule.
                        Show smile in upper left. Show frown center and partially overlapping.
    -->
    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
        <head>
            <layout type="text/smil-basic-layout">
                <root-layout width="680" height="480"/>
                <region id="r1" top="0%" left="0%" height="50%" width="50%" z-index="0"/>
                <region id="r2" top="25%" left="25%" height="50%" width="50%" z-index="0"/>
            </layout>
        </head>
        <body>
            <par dur="10s">
                <img region="r1" src="../images/smile.jpg" />
                <img region="r2" src="../images/frown.jpg" />
            </par>
        </body>
    </smil>