Does opacity:0 have exactly the same effect as visibility:hidden

Question

If so, does it effectively deprecate the visibility property?

(I realize that Internet Explorer does not yet support this CSS2 property.)
Comparis

Answer 1

Im not sure entirely, but this is how i do cross browser transparency:

opacity: 0.6;
-moz-opacity: 0.6;
filter: alpha(opacity=60);

objects with Visibility:hidden still have shape, they just arent visible. opacity zero elements can still be clicked and react to other events.