If I insert the following code in HTML view:

 
<object data="/upload/intro.swf" type="application/x-shockwave-flash" width="420" height="330" id="forside_flash">
  <param name="wmode" value="transparent" />
  <param name="movie" value="/upload/intro.swf"/>
</object>

Switch to Normal and back to HTML view:  

<object id="forside_flash" type="application/x-shockwave-flash" height="330" width="420" data="/upload/intro.swf"></object>

The embedded param tags have gone.