在chrome浏览器里面，设置swf背景透明，怎么整个都变透明了

如题，其他浏览器都能背景透明，就是chrome不行，代码如下
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0" width="160" height="200">
<param name="movie" value="intro.swf">
<param name="quality" value="high">
<param name="wmode" value="transparent">
<embed src="intro.swf" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="160" height="200" wmode="transparent">
</object>