Falling objects Easing Effects in AS2

How can I put to the object when it touches and press it will fall down with easing out effects in AS2? I converted the object into movieclip, so far what I did is when it click it the object disappear quickly, I want to see the object fall down in realistic way. I’m just new in Action Scripting so i need your help guys. So far here is my code in each objects.

on(press){
this._y +=200.5 ;
}