First: this is not possible for the online version in a browser because of security restrictions,

But for an offline title (like a magazine copied on CD, DVD or memory stick), it is pretty simple to accomplish.

1. Follow the instructions given in the Wiki article
2. You insert this little snippet
   

   <script type="text/javascript">// <![CDATA[
      import flash.display.StageDisplayState;
      megazine.stage.displayState = StageDisplayState.FULL_SCREEN;
   // ]]>
   </script>

   either within a <foreground> or <background> tag