用以下代码在html中加入flash文件时想显示一个进度条应该怎么办?
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" height="195" width="260">
<param name="movie" value="filename.swf" />
<param name="quality" value="best" />
<param name="play" value="true" />
<embed height="195" pluginspage="http://www.macromedia.com/go/getflashplayer" src="filename.swf" type="application/x-shockwave-flash" width="260" quality="best" play="true"></embed>
</object>