高手帮忙看看。这个广告效果的大FLASH是居左的。怎么才能让它居中啊？

大的Flash.怎么才能让它居中
http://www.lanrentuku.com/down/js/quanping-376/flash/200x200.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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>可关闭重播的Flash</title>
</head>
<body>
<SCRIPT language="Javascript"> 
function insertFlash1(elm,url,w,h)
{
if(!document.getElementById(elm))return ;
var str='';
str+='<embed width="'+w+'" height="'+h+'" src="'+url+'" quality="autohigh" wmode="transparent" type="application/x-shockwave-flash" plugspace="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"></embed>';
document.getElementById(elm).innerHTML=str;
}var ad_Link='http://www.newasp.net';
var ad_Title='新云网络';
var ad_MaxPicUrl='http://www.lanrentuku.com/down/js/quanping-376/flash/200x200.swf';
var ad_MaxPicWidth=200;
var ad_MaxPicHeight=200;var ad_MinPicUrl='http://www.lanrentuku.com/down/js/quanping-376/flash/100x100.swf';
var ad_MinPicWidth=100;
var ad_MinPicHeight=100;var sscae;
ttcae=setTimeout("showHide('ad_pals','','hide')",5000);
function indObj(n,d)
{
var p,
i,
x;
if(!d)d=document;
if((p=n.indexOf("?"))>0&&parent.frames.length)
{
d=parent.frames[n.substring(p+1)].document;
n=n.substring(0,p);
}
if(!(x=d[n])&&d.all)x=d.all[n];
for(i=0;!x&&i<d.forms.length;i++)x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++)x=indObj(n,d.layers[i].document);
if(!x&&d.getElementById)x=d.getElementById(n);
return x;
}
function showHide()
{
var i,
p,
v,
obj,
args=showHide.arguments;
for(i=0;i<(args.length-2);i+=3)if((obj=indObj(args[i]))!=null)
{
v=args[i+2];
if(obj.style)
{
obj=obj.style;
v=(v=='show')?'visible':(v=='hide')?'hidden':v;
}
obj.visibility=v;
}
insertFlash1("advsl_swf",ad_MinPicUrl,ad_MinPicWidth,ad_MinPicHeight);
document.getElementById("adv_e").style.visibility="visible";
document.getElementById("hideclose").style.visibility="visible";
}function repsl()
{
var i=repsl.arguments;
if(i[0]=='show')
{
insertFlash1("ad_swf",ad_MaxPicUrl,ad_MaxPicWidth,ad_MaxPicHeight);
sscae=setTimeout("showHide('ad_pals','','hide')",5000)
}
}document.writeln('<div id="ad_pals" style="position:absolute; visibility:visible; z-index:11;left:0px;">');
document.writeln('<div style="position:absolute; z-index:12; top:0px;left:0px;">');
document.writeln('<a href="'+ad_Link+'" target="_blank">');
document.writeln('<img src="blank.gif" title="'+ad_Title+'" alt="'+ad_Title+'" width="'+ad_MaxPicWidth+'" height="'+ad_MaxPicHeight+'" border="0">');
document.writeln('</a>');
document.writeln('<table width="'+ad_MaxPicWidth+'" border="0" cellpadding="0" cellspacing="0">');
document.writeln('<tr>');
document.writeln('<td align="right" style="height:12px;padding-top:2px;padding-right:3px;">');
document.writeln('<a href="javascript:void(0);" onclick=closeFB("ad_pals"); title="关闭上面的广告" style="font-size:12px;text-decoration:none;">');
document.writeln('关 闭');
document.writeln('</a>');
document.writeln('</td>');
document.writeln('</tr>');
document.writeln('</table>');
document.writeln('</div>');
document.writeln('<div id="ad_swf"></div>');
document.writeln('</div>');insertFlash1("ad_swf",ad_MaxPicUrl,ad_MaxPicWidth,ad_MaxPicHeight);
function closeFB(dlid1)
{
window.clearTimeout(ttcae);
window.clearTimeout(sscae);
document.getElementById(dlid1).style.visibility='hidden';
showHide('ad_pals','','hide');
}document.writeln('<div id="adv_e" style="position:absolute;visibility:hidden;z-index:1;overflow:visible;">');
document.writeln('<div style="position:absolute; z-index:2; width:'+ad_MinPicWidth+'px;height:'+ad_MinPicHeight+'px;top:0px;left:0px;overflow:visible;">');
document.writeln('<a href="'+ad_Link+'" target="_blank">');
document.writeln('<img src="blank.gif" title="'+ad_Title+'" alt="'+ad_Title+'" width="'+ad_MinPicWidth+'" height="'+ad_MinPicHeight+'" border="0">');
document.writeln('</a>');
document.writeln('<table width="'+ad_MinPicWidth+'" border="0" cellspacing="0" cellpadding="0">');
document.writeln('<tr>');
document.writeln('<td style="height:12px">');
document.writeln('<div align="center" id="restar" style="background-color:#000000;">');
document.writeln('</div>');
document.writeln('<div onclick=showHide("ad_pals","","show");repsl("show");closebtn(); style="font-size:12px;color:#CCC;line-height:20px;background-color:#000;text-align:center;text-decoration:none;cursor:pointer;" title="重播广告">');
document.writeln('重 播');
document.writeln('</a>');
document.writeln('</div>');
document.writeln('</td style="height:12px">');
document.writeln('<td>');
document.writeln('<div align="center" id="hideclose" style="background-color:#CCCCCC;visibility:hidden;">');
document.writeln('</div>');
document.writeln('<div onclick="javascript:closebtn();" style="font-size:12px;color:#000;line-height:20px;background-color:#CCC;text-align:center;text-decoration:none;cursor:pointer;" title="关闭广告">');
document.writeln('关 闭');
document.writeln('</a>');
document.writeln('</div>');
document.writeln('</td>');
document.writeln('</tr>');
document.writeln('</table>');
document.writeln('</div>');
document.writeln('<div id="advsl_swf">');
document.writeln('</div>');
document.writeln('</div>');
function closebtn()
{
document.getElementById("adv_e").style.visibility="hidden";
document.getElementById("hideclose").style.visibility="hidden";
}
var body;
var minPicHeight=80;
var maxPicHeight=240;if(document.documentElement.clientHeight)
{
body=document.documentElement.clientHeight;
}
else
{
body=document.body.clientHeight;
}
initDT()
function initDT()
{
var adv_e=document.getElementById("adv_e");
adv_e.style.left="5px";
if(document.documentElement&&document.documentElement.scrollTop)
{
adv_e.style.top=(document.documentElement.scrollTop+(body-100-minPicHeight))+"px";
}
else if(document.body)
{
adv_e.style.top=(document.body.scrollTop+(body-100-minPicHeight))+"px";
}

var ad_pals=document.getElementById("ad_pals");
ad_pals.style.left="5px";
if(document.documentElement&&document.documentElement.scrollTop)
{
ad_pals.style.top=(document.documentElement.scrollTop+(body-200-maxPicHeight))+"px";
}
else if(document.body)
{
ad_pals.style.top=(document.body.scrollTop+(body-200-maxPicHeight))+"px";
}
setTimeout("initDT();",100);
}
</SCRIPT>
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</body>
</html>