做一个新数组，重复的不加入
<script type="text/javascript">Array.prototype.delrepeat = function() {var arr = this;var _arr = new Array();for (var i in arr) {if (i == 'delrepeat') continue;if (_arr.length == 0) _arr.push(arr[i]);for (var j = 0; j < _arr.length; j++) {if (arr[i] == _arr[j]) {break;}if (j > _arr.length - 2) _arr.push(arr[i]);}}return _arr;
}
alert([1, 1, 7, ,9,1, 2, 2, 3, 4, 5,9, 5].delrepeat());
</script>
 最小割最大流)
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