Flah content inside div tags alignment question

hi I am trying to sqeeze a flash swf inside div tag and I am having a little trouble centering it right, unless there is a another way of adding swf.


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script language="javascript">AC_FL_RunContent = 0;</script>
<script src="AC_RunActiveContent.js" language="javascript"></script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>home</title>
<link href="styles.css" rel="stylesheet" type="text/css" />
<style type="text/css">
<!--
body {
    margin-left: 0px;
    margin-top: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
    background-color: #6caecd;
}
-->
</style></head>

<body>
<div class="container" id="header"></div>
<div class="menu" id="menu_bg">
<div id="navcontainer">
<ul>
<li><a href="index.html" target="_top">Apie Mane</a></li>
<li><a href="albumas.html" target="_top">Albumai</a></li>
<li><a href="naujienos.html" target="_top">Kas Naujo</a></li>
<li><a href="mobilus.html" target="_top">Mobilus</a></li>
<li><a href="contact.html" target="_top">Kontaktuok Mane</a></li>
</ul>
</div>
</div>
<div class="menu" id="menu_bg2"></div>
<div class="main_window" id="content_bg">
<div id="flash">
<script language="javascript">
    if (AC_FL_RunContent == 0) {
        alert("This page requires AC_RunActiveContent.js.");
    } else {
        AC_FL_RunContent(
            'codebase', 'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0',
            'width', '634',
            'height', '600',
            'src', 'flash',
            'quality', 'high',
            'pluginspage', 'http://www.macromedia.com/go/getflashplayer',
            'align', 'middle',
            'play', 'true',
            'loop', 'true',
            'scale', 'showall',
            'wmode', 'window',
            'devicefont', 'false',
            'id', 'albumas',
            'bgcolor', '#d8e9f2',
            'name', 'albumas',
            'menu', 'true',
            'allowFullScreen', 'false',
            'allowScriptAccess','sameDomain',
            'movie', 'albumas',
            'salign', ''
            ); //end AC code
    }
</script>
<noscript>
    <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="634" height="600" id="albumas" align="middle">
    <param name="allowScriptAccess" value="sameDomain" />
    <param name="allowFullScreen" value="false" />
    <param name="movie" value="flash.swf" /><param name="quality" value="high" /><param name="bgcolor" value="#d8e9f2" />    <embed src="flash.swf" quality="high" bgcolor="#d8e9f2" width="634" height="600" name="flash align="middle" allowScriptAccess="sameDomain" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
    </object>
</noscript>
</div>
</div>
</body>
</html>