Invisibility, effects and hideplayer()

[Raeiphon]

I'm planning to script an invisibility suit. I've toyed around with the hideplayer function, and I have a few questions:

Does hideplayer(); work as a toggle when no float is specified, or does it not work at all? There doesn't appear to be a showplayer function, so this is confusing me.

Also, is there any way to produce the effect of a player fading out in a ganiscript? I'm not too proficient with both ganiscript and the emitter, so I haven't really tried. I'm after a shaking/fading effect that's often seen in horror movies (I can't really explain it, but I could probably do it if there was a way to express a player as an emitter object)