height 100% and width 100%

Hi,

I am wondering why it is not possible to set height or width to 100%?
I often use this parameter when dealing with flash files and find it troublesome that this feature is not implemented.

I have tested several scenarios with standard embeds, macros and theme processing, all seem to miss this option. Also all my tests wrap perfectly when i set 100% in Firebug. I have not been able to find anything in the documentation or the issue query. There is this suggestion which seems very complicated http://drupal.org/node/317603 also this person is requesting the same thing http://drupal.org/node/317605

Hope you can point me in the right direction.
Thanks for the effort and a great module:)