How do you drop an swf to a lower Z layer?

I have just inserted an swf into one of my pages and it sits above my Javascript Drop down menu, causing half of the menu to disappear under the swf.

The menu has a “Z order” variable which is set to a base level of 1000, I have changed the variable to 2000 assuming that nothing could sit that high, however no change was visable.

Flash looks to be sitting on the highest layer/level, so is there a way in Dreamweaver to drop it beneath layers 1000-1013?