Thanks Ethuongmai
I tried with SWF object in separate Dotnet application , there it is working fine . When I am trying in Dotnetnuke 4.8.4 , I am not getting my flash file . Instaed it is displaying "Alternative content"
My design Code
<script type="text/javascript" src="swfobject.js"></script>
<script type="text/javascript">
swfobject.registerObject("myId", "9.0.0", "expressInstall.swf");
</script>
<div>
<object id="myId" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="300" height="200">
<param name="movie" value="images/flashiness/actnow.swf" />
<!--[if !IE]>-->
<object type="application/x-shockwave-flash" data="images/flashiness/actnow.swf" width="300" height="200">
<!--<![endif]-->
<p>Alternative content</p>
<!--[if !IE]>-->
</object>
<!--<![endif]-->
</object>
</div>
swfobject File Path : DesktopModules/"My Module"/swfobject.js
Flash File Path : DesktopModules/"My Module"/images/flashiness/actnow.swf
Thanks for Please Helping me