/*删除数组中的重复元素，并返回去重的数组*/function delRepeatNum(arr){    var result = [];    var middleObj = {};    var temp;    for(var i = 0; i < arr.length; i++){        temp = arr[i];        middleObj[temp] = 1;    }        for(temp in middleObj){        result.push(temp);    }    return result;}