html:谁知道下面代码的意思，请每句注释好，每句！特别是为什么出现两次images⼀top.swf，有什么作用么？

<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="960" height="130"> <param name="movie" value="images/top.swf" /> <param name="quality" value="high" /> <param name="wmode" value="transparent" /> <embed src="images/top.swf" quality="high" wmode="opaque" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="960" height="130"></embed> </object>