Loading a transparent swf into a html table

1

Really basic question (we are flash noobs) but we are just debating this here. We have a html page into which we have a table with a background image. What we want to do is load a transparent swf movie into this table so we can see the background image still. Still making sense? anyway wahy we want to do is load and unload swf’s into this table without affecting the background (and still see the background). I sure it can be done fairly easily but just intersted to know how others would go about it, thanks