Flash as 中关于MC的控制问题

dict[(event.currentTarget as MovieClip)];

这个方法有点笨，当MC很多的时候，代码就显得很冗余：
a0_mc.addEventListener(MouseEvent.CLICK,a0);
function a0(event:MouseEvent) {
       a0_mc.buttonMode=true;
       b_mc.gotoAndStop(2);
}
a1_mc.addEventListener(MouseEvent.CLICK,a1);
function a1(event:MouseEvent) {
       a1_mc.buttonMode=true;
       b_mc.gotoAndStop(3);
}
a2_mc.addEventListener(MouseEvent.CLICK,a2);
function a2(event:MouseEvent) {
       a2_mc.buttonMode=true;
       b_mc.gotoAndStop(4);
}
a3_mc.addEventListener(MouseEvent.CLICK,a3);
function a3(event:MouseEvent) {
       a3_mc.buttonMode=true;
       b_mc.gotoAndStop(5);
}
a4_mc.addEventListener(MouseEvent.CLICK,a4);
function a4(event:MouseEvent) {
       a4_mc.buttonMode=true;
       b_mc.gotoAndStop(6);
}
a5_mc.addEventListener(MouseEvent.CLICK,a5);
function a5(event:MouseEvent) {
       a5_mc.buttonMode=true;
       b_mc.gotoAndStop(7);
}

谁有更好的方法，可以分享哈！