做一个flash的球类碰撞检测函数，一直提示访问属性未定义

1package{
import flash.display.MovieClip;
import flash.display.Shape;  
import flash.events.*;
import flash.text.TextField; 

public class ball extends MovieClip{
public function ball(){
this.addEventListener(Event.ADDED,addHd);
}
private function addHd(e:Event){
this.stage.addEventListener(Event.ENTER_FRAME,enterFramehandler);
this.removeEventListener(Event.ADDED,addHd);
}
private function enterFramehander(e:Event):void
{
if(this.blam.hitTestPoint(shot.x,shot.y,true))
this.blam.play();
this.stage.removeEventListener(Event.ENTER_FRAME,enterFramehandler);
}
}
提示访问属性enterFramehandler未定义
}

马虎！
private function enterFramehander 中 enterFramehander 应写成 enterFramehandler，少了一个字母l。

你说呢...