[kackbip]

import flash.utils.getDefinitionByName;
import flash.event.MouseEvent;
 
var cl:Class = getDefinitionByName("clip1") as Class;
var mc:MovieClip = new cl();
mc.x = 100;
mc.y = 100;
 
btn.addEventListener(MouseEvent.CLICK, onClick);
 
function onClick(evt:MouseEvent):void{
   addChild(mc);
}