Simple Image fade help needed plz!

okay, I am staring at the obvious. I have the code to fade a MC in. I just ned the reverse…

heres the fade in code:

// set the MC ‘fader’ to hidden

//fader function
go.onRollOver = function(){
fader.onEnterFrame = function(){
this._alpha>=100 ? delete this.onEnterFrame : this._alpha+=5

Also, If any 1 knows how to set a reaction of buttons to fade in, ie button 1 fades in, then buitton 2, then button 3… I would be really greatfull!

i know: this._alpha=0 , will set to zero, but I forgot how to make it fade down… this is painfully simple… Any 1 please? 8-]