<td width="498"><div align="center">
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="490" height="150">
<param name="movie" value="img/flash_banner.swf" />
<param name=quality value=high />
<embed src="img/flash_banner.swf" quality=high pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="490" height="150"></embed>
</object>
</div></td>.
This is how DW MX writes the code for it... i could just enclose some attributes with the required double quotes, but there are still some errors in the validator, like "there is no attribute pluginspage" and the same for height, width, type etc...