Flash object

I have a Flash Object embed in my page, and I want that if the browser have not the flash's plugin, appear a gif image instead of a broken image reference. How can I do this?

Example of my code sourse ( I try with a background image, but it doesn't work )

<embed src="Writing.swf" quality="high" WIDTH="540" HEIGHT="236" TYPE="application/x-shockwave-flash"
PLUGINSPAGE="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"
style="background-image: url('logo_netone_2.jpg')"> <noembed>text</noembed>
</EMBED>

How about using a javascript to check for plugin and then pointing the user to page based on the return of plugin information? I got the code from somewhere (free to use but must have dev info left in) and did that on my index.htm at http://www.fenceworld.cc. you R welcome to view source and take if this solution works for you.