This article impressed me enough to share it. If you are creating a website with a css drop-down menu that happens to rest directly north of a placed swf animation, you will find Internet Explorer ignores any z-index settings you may have placed. (Layering the Flash animation below the drop downs.) Much to your dismay, your drop down menus will go below the flash no matter what your z-index settings are!
Thanks to the Slightlymore site – I was able to add the following parameter within my placed .swf code & it immediately was layered properly! Thank you, Slightlymore!