flash前台透明显示

<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockw
ave/cabs/flash/swflash.cab#version=6,0,29,0">
<param name="movie" value="swf/top.swf" />
<param name="quality" value="high" />
<param name="wmode" value="transparent" />
<embed src="swf/top.swf" wmode="transparent" quality="high" pluginspage="http://www.macromedia.com/go/getflashp
layer" type="application/x-shockwave-flash" width="770" height="148"></embed>
</object>

关键代码：wmode="transparent"　　注：将此属性放入<param name="wmode" value="transparent">不能达到透明效果