I found a fun piece of code for iPad. It is an example of how to swap a Flash SWF with an image if your user agent is an iPad.

<a href="http://www.combsconsulting.com/ipad-replace-flash-with-image-java-script-example/">http://www.combsconsulting.com/ipad-replace-flash-with-image-java-script-example/</a>