Usually when using dw to insert flash, the system generated code is as follows:
<objectclassid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000
codebase=http://download.macromedia.com/pub/
shockwave/cabs/flash/swflash.cab#version=7,0,19,0width=980
height=200>
<paramname=movievalue=images/ban.swf/>
<paramname=qualityvalue=high/>
<embedsrc=images/ban.swfquality=high
pluginspage=http://www.macromedia.com/go/getflashplayer
type=application/x-shockwave-flashwidth=980height=200>
</embed>
</object>
In this way, you will find that the inserted flash file blocks other layers, that is, the other ones are behind this flash file, and the content on these layers must be displayed, so you need to add the following sentence to solve the problem.
<paramname=wmodevalue=transparent/>