獲得影片剪輯對應的層數計算影片剪輯上有多少個影片剪輯

1 2 3 4 5 6 7 8 9 var a: int ;  var b: int ; var num: int ; for ( var i: int = 1 ; i<= 7 ; i++) {      trace (MovieClip( this [ "a" + i]).name);      trace ( this .getChildIndex(MovieClip( this [ "a"

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