JS在FF里替换不了视频元素
程序代码：<html>
<head>
<script type="text/javascript" language="javascript">
function dytt(){
document.getElementById("dy2").innerHTML="<object classid='clsid:F3D0D36F-23F8-4682-A195-
74C92B03D4AF' width='640' height='550' id='QvodPlayer' name='QvodPlayer' onError=if
(window.confirm('请您先安装QvodPlayer软件,然后刷新本页才可以正常播放.')){window.open
('http://www.')}else{self.location='http://www.'}><PARAM NAME='URL'
VALUE='qvod://891017950|2E07DE17685A0A3307474335F054B0CBEFB16F02|未来警察BD.rmvb|'><PARAM
NAME='Autoplay' VALUE='1'></object>";}
</script>
</head>
<body>
<div class="dy" id="dy2">
<embed type="application/x-shockwave-flash"
src="http://player. id="movie_player"
name="movie_player" bgcolor="#FFFFFF" quality="high" allowfullscreen="true"
flashvars="isShowRelatedVideo=false&showAd=0&show_pre=1&show_next=1&isAutoPlay=false&isDebug=false
&UserID=&winType=interior&playMovie=true&MM
Control=false&MMout=false&RecordCode=1001,1002,1003,1004,1005,1006,2001,3001,3002,3003,3004,3005,3
007,3008,9999" pluginspage="http://www. width="640" height="550">
</embed>
</div>
<a href="#" onclick="dytt()">快播</a>
</body>
</html>问一下，这段换视频的JS代码，在世界之窗，360，IE都可以正常换掉元素，显示快播播放器。而firefox却没作用，显示不出来，这个到底怎么搞的啊，求高人指点一二！
