I’ve gotten tired of my Flashpresentation movies not being valid HTML. After some research and a tip from a friend of mine I found this solution to the problem.

<object type="application/x-shockwave-flash" data="images/banner.swf" width="288" height="128">
<param name="movie" value="images/banner.swf" />
<img src="banner.gif" width="288" height="128" alt="banner" />
</object>

It works great and shows a image file if Flash support isn’t available.

Source: http://www.ambience.sk/flash-valid.htm