title: Flash element not transparent in Firefox
body: <p>I put a flash mp3 player element in my HTML page.
  This element has a transparent background.</p>
  
  <pre><code>&lt;div id="player"&gt;
  &lt;object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="100" height="30" id="mp3player" align="middle"&gt;
      &lt;param name="movie" value="mp3player.swf" /&gt;
      &lt;param name="quality" value="high" /&gt;
      &lt;param name="bgcolor" value="#000000" /&gt;
      &lt;param name="play" value="true" /&gt;
      &lt;param name="loop" value="true" /&gt;
      &lt;param name="wmode" value="transparent" /&gt;
      &lt;param name="scale" value="showall" /&gt;
      &lt;param name="menu" value="true" /&gt;
      &lt;param name="devicefont" value="false" /&gt;
      &lt;param name="salign" value="" /&gt;
      &lt;param name="allowScriptAccess" value="sameDomain" /&gt;
  &lt;!--[if !IE]&gt;--&gt;
  &lt;object type="application/x-shockwave-flash" data="mp3player.swf" width="100" height="30"&gt;
      &lt;param name="movie" value="mp3player.swf" /&gt;
      &lt;param name="quality" value="high" /&gt;
      &lt;param name="bgcolor" value="#000000" /&gt;
      &lt;param name="play" value="true" /&gt;
      &lt;param name="loop" value="true" /&gt;
      &lt;param name="wmode" value="transparent" /&gt;
      &lt;param name="scale" value="showall" /&gt;
      &lt;param name="menu" value="true" /&gt;
      &lt;param name="devicefont" value="false" /&gt;
      &lt;param name="salign" value="" /&gt;
      &lt;param name="allowScriptAccess" value="sameDomain" /&gt;
  &lt;!--&lt;![endif]--&gt;
      &lt;a href="http://www.adobe.com/go/getflash"&gt;
          &lt;img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /&gt;
      &lt;/a&gt;
      &lt;!--[if !IE]&gt;--&gt;
  &lt;/object&gt;
  &lt;!--&lt;![endif]--&gt;
  &lt;/object&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Firefox in Windows 7 displays a transparent background while it does not happen with Windows XP.</p>
  
  <p>How can this problem be solved?
  Thanks </p>
  
  <p>EDIT</p>
  
  <p>I noticed that my flash element at the start has a transparent background but after mouse-over the background turns black and stays black.
  Is possible using jquery to force the flash wmode parameter trasparent on mouse-over and/or
  mouse-out?
  Thanks</p>