让Flash在Firefox和IE下背景透明

<object width="425" height="344">

<param name="movie" value="Flash url"></param>

<param name="allowFullScreen" value="true"></param>

<param name="wmode" value="transparent"></param>

<embed src="Flash url" type="application/x-shockwave-flash" wmode="transparent" allowfullscreen="true" width="425" height="344"></embed>

</object>

粗体部分加上即可！