I'm trying to create a site with category list that opens subcategory pop-up boxes. The category pop-up boxes will still be part of the flash so i'm controlling the display tru css style (overflow property). I used and overflow value of "hidden" so that the only part that shows initially is the list of first level category. it's a little hard to explain but, anyway, here's a sample html and flash file: http://www.fathermarcuss.com/overflowtest/ It's working perfectly on IE7 but i can't seem to make it work on IE6 and Firefox. the "overflow: hiddin" is not working on Firefox Here's the website i'm trying to copy (category section on left): http://www.auction.co.kr/ I'm also attaching a snapshot of the file i'm trying to copy: