Animate元件怎么添加点击清除的效果?

import flash.display.MovieClip;
import flash.events.MouseEvent;
var num:int=this.numChildren;
for(var i:int=0;i<num;i++)
{
var obj:MovieClip=this.getChildAt(i) as MovieClip;
obj.addEventListener (MouseEvent. CLICK,ClearMC) ;
}
function ClearMC (e:MouseEvent) :void
{
var obj:MovieClip=e.currentTarget as MovieClip;
this.removeChild(obj) ;
}