第一种方法：
css 代码：
代码如下:
.b970-a{width:970px; height:103px; margin:4px auto; overflow:hidden;}
html 代码：
<div class=b970-a> <
<object classid=clsid:d27cdb6e-ae6d-11cf-96b8-444553540000 codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0 width=970 height=107>
<param name=movie value=images/flash_ad-3-26.swf>
<param name=quality value=high>
<param name=wmode value=transparent>
<embed src=images/flash_ad-3-26.swf width=970 height=107 quality=high pluginspage=http://www.macromedia.com/go/getflashplayer type=application/x-shockwave-flash wmode=transparent></embed>
</object>
</div>
第二种方法 兼容性好：
css 代码：
代码如下:
.b970-a{width:970px; height:103px; margin:5px auto; z-index:2; overflow:hidden;}
html 代码：
<object width=970 height=103
codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=4,0,2,0
classid=clsid:d27cdb6e-ae6d-11cf-96b8-444553540000>
<param value=images/flash_ad-3-26.swf name=movie>
<param value=high name=quality>
<param value=transparent name=wmode>
<param value=exactfit name=scale>
<embed width=970 height=103 wmode=transparent type=application/x-shockwave-flash
pluginspage=http://www.macromedia.com/shockwave/download/index.cgi?p1_prod_version=shockwaveflash
quality=high src=images/flash_ad-3-26.swf>
</object>
