overlay_zindex.smil.html

<smil>
 <head>
  <layout>
   <root-layout width="300" height="200" background-color="white" />
   <region id="region_1" left="50" top="50" width="150" height="125" z-index="2" background-color="#EEFFEE" />
   <region id="region_2" left="25" top="25" width="100" height="100" z-index="1" background-color="#DDDDDD" />
  </layout>
 </head>
 <body>
  <par>
   <text src="text1.txt" region="region_1" />
   <text src="text2.txt" region="region_2" />
  </par>
 </body>
</smil>