DIV覆盖在swfobject加载的SWF上无法居中?
var flashvars = {};  
var params = {
	menu: "false",
	wmode: "opaque",
	allowFullScreen: "true"
};  
var attributes = {
	id: "videoplayer",    
	name: "videoplayer"
};  
swfobject.embedSWF("asjs3.swf", "FlashContent", "600", "600", "10.2.152","expressInstall.swf", flashvars, params, attributes);
<div id="DivOut" style="position:relative;" >       //最外层  
<div id="DivIn" style="position:absolute;" align="center"></div>    //最上层
<div id="FlashContent" style="position:absolute;"></div>   //中间层,显示SWF
</div>
最上层里面的内容无法居中,如果最上层的宽高设置和SWF一样大小,可以居中,但无法点击 SWF 里的按钮
求方法.
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