as 数组去重复元素
var a:Array=new Array("a","a","c","b","b","b","c","f","c","d","d","d","g","g","g","g","c","g","c","g","g","c","g","g","g");for (var i:int = a.indexOf("c"); i <= a.lastIndexOf("c"); i++) { var _n:uint=a.indexOf("c"); _n>=0&&a.splice(_n,1);//当索引为-1时不能删除，否则会误删} as数组中去掉重复的元素，找不到元素时不会误删除元素。
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