SWFUploader in administrative console

Currently we move flash uploader control to an absolutely positioned div to prevent it's crashing in cases, where div, where form is located becomes semi-transparent (when upload progress bar is shown). I propose different approach to transparency making, that will allow us to leave flash as is, because it should not crash anymore.

We should create another div with required transparency level with size of original div, that was made transparent before. New div should be placed exactly on current div so visual effect maybe the same.

This way thickbox javascript class does and I think, that they have serious reasons for that.