DHTML PopUp Flash Movie

<div id="flashbox">
  <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" 
  codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" 
  width="450" height="450" id="flashbox" align="middle">
    <param name="allowScriptAccess" value="sameDomain" />
    <param name="movie" value="../flash/54s.swf" />
    <param name="menu" value="0" />
    <param name="quality" value="High" />
    <param name="wmode" value="Transparent" />
    <param name="bgcolor" value="000000" />
    <param name="_cx" value="11906">
    <param name="_cy" value="11906">
    <param name="FlashVars" value>
    <param name="Src" value="../flash/54s.swf">
    <param name="Play" value="-1">
    <param name="Loop" value="0">
    <param name="SAlign" value>
    <param name="Base" value>
    <param name="Scale" value="ShowAll">
    <param name="DeviceFont" value="0">
    <param name="EmbedMovie" value="0">
    <param name="SWRemote" value>
    <param name="MovieData" value>
    <param name="SeamlessTabbing" value="1">
    <embed src="54s.swf" menu="false" quality="high" wmode="transparent" bgcolor="#000000" width="450" height="450" name="flashbox" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /></object>
  <br />
  <a href="#" 
  onclick="document.getElementById('flashbox').style.visibility='hidden';return false">
  Schließen</a>
  </div> 

div#flashbox {
  position: absolute;
  top: 25%;
  left: 25%;
  width: 450px;
  height: 450px;
  background: transparent;
  visibility:visible;
}
@media screen{
  body>div#flashbox{ position:fixed; }
}