I am not aware of any z-index. Between your question and dynaman's response I'm also a little confused here; are you asking if it exists or what the numbers mean? If the latter I'll have to try adding a number to LoadImage and see what happens; as I said I wasn't even aware of this.
EDIT: I just tried it and got an error. Unless I missed an upgrade I have no idea what dynaman is talking about. There is no such thing as a z-index, but him explaining how it works would naturally assume that such a thing exists.
EDIT: I just tried it and got an error. Unless I missed an upgrade I have no idea what dynaman is talking about. There is no such thing as a z-index, but him explaining how it works would naturally assume that such a thing exists.