Centrer mon anim flash

Bonjour a tous, j'ai une petite question toute bête, je voudrai savoir comment centrer mon anim flash dans ma page html. Le souci est que je ne veux pas que quand l'internaute redimentionne la fenêtre, l'anim se redimmentionne aussi. C'est pour ca que je ne peux pas utiliser les pourcentage en height et witdh.
Voici mon code de ma page html :

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>ecardweb</title>
<script src="http://www.yozik.com/script/swfobject.js"></script>
<script src="http://www.yozik.com/script/yoplayer.js"></script>
<script type="text/javascript" src="http://www.yozik.com/script/prototype.js"></script>
<script type="text/javascript">

function gid(name) {
return document.getElementById(name);
}
function sendEvent(swf,typ,prm) {
thisMovie(swf).sendEvent(typ,prm);
};
function getUpdate(typ,pr1,pr2,swf) {
if(typ == "state" && swf == "yoplayer") {
gid('yostate').innerHTML = pr1;
gid('bricabrac').yoflashstate(pr1);
}
if(typ == "item" && swf == "yoplayer") {
var obj = thisMovie(swf).itemData(pr1);
gid('yotype').innerHTML = obj['type'];
gid('yotitle').innerHTML = obj['title'];
gid('yoimage').innerHTML = obj['image'];
gid('yoid').innerHTML = obj['id'];
gid('yofile').innerHTML = obj['file'];
gid('bricabrac').yoflashitem(obj['type'],obj['title'],obj['image'],obj['id'],obj['file']);
}
if(typ == "time" && swf == "yoplayer") {
gid('yoelapse').innerHTML = pr1;
gid('yoremaining').innerHTML = pr2;
gid('bricabrac').yoflashtime(pr1,pr2);
}
};
function loadFile(swf,obj) {
thisMovie(swf).loadFile(obj);
};
function getLength(swf) {
var len = thisMovie(swf).getLength();
alert('the length of the playlist is: '+len);
};
function addItem(swf,obj,idx) {
thisMovie(swf).addItem(obj,idx);
};
function removeItem(swf,idx) {
thisMovie(swf).removeItem(idx);
};
function itemData(swf,idx) {
var obj = thisMovie(swf).itemData(idx);
var txt = "";
for(var i in obj) {
txt += i+": "+obj[i]+"\n";
}
alert(txt);
};
function yoSetVolume(swf,sensvolume) {
yovol = sensvolume;
sendEvent('yoplayer','volume',yovol);
gid('yovolume').innerHTML = yovol;
gid('bricabrac').yoflashvolume(yovol);
};
function thisMovie(movieName) {
if(navigator.appName.indexOf("Microsoft") != -1) {
return window[movieName];
} else {
return document[movieName];
}
};

</script>
<style type="text/css">

</style>
</head>
<body bgcolor="#ffffff">
<script src="http://www.yozik.com/script/prozik.php?libtheme=sansbordureaveccroix"></script>
<div class="conteneur">

<div id="player"></div>
<script type="text/javascript">
if (videorit==undefined)
{var videorit = new Window({id:"videorit", className: "sansbordureaveccroix",width:490, height:320, zIndex:100});}
var so = new SWFObject('mediaplayer.swf','yoplayer','0','0','8');
so.addParam('allowscriptaccess','always');
so.addParam('allowfullscreen','true');
so.addVariable('height','0');
so.addVariable('width','0');
so.addVariable('file','http://www.yozik.com/data/4/XML/playlist-18.xml');
so.addVariable('backcolor','0xD81678');
so.addVariable('frontcolor','0xF39BC2');
so.addVariable('lightcolor','0xFFFFFF');
so.addVariable('screencolor','0xD81678');
so.addVariable('displaywidth','0');
so.addVariable('autoscroll','true');
so.addVariable('thumbsinplaylist','false');
so.addVariable('autostart','true');
so.addVariable('repeat','list');
so.addVariable('shuffle','false');
so.addVariable('linktarget','_self');
so.addVariable('javascriptid','yoplayer');
so.addVariable('enablejs','true');
so.write('player');
</script>

<a href="http://www.yozik.com"></a>
<a href="http://www.yotanka.net"></a>
<a href="http://www.jawarit.com"></a>


<div id="bricabrac"></div>
<script type="text/javascript">
var so = new SWFObject('index.swf','bricabrac','880','660','8');
so.addParam('allowscriptaccess','always');
so.addParam('allowfullscreen','true');
so.addParam('wmode','transparent');
so.write('bricabrac');
</script>
</div>
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-355588-7";
urchinTracker();
</script>
</body>
</html>

Merci a ceux qui pourront m'aider