Can a div be partially transparent in cfdocument pdfs? How?

Question

Need a div to partially show the image behind it, is this even possible? Tried:

opacity:.5;

AND

filter:alpha(opacity=50);

Both produce a solid div.

Any help would be much appreciated.

Answer 1

From a wondrous pure guess in a comment, I managed to find a working answer:

Did you try using a semi-transparent .png?

Yay!