使用函数数组翻转

 规律newArr[newArr.length]=arr[i]// 新数组下标：newarr.length  0,1,2,3,4//原数组倒序的值: arr[i]      5,4,3,2,1

function rever(arr){var newArr=[];for(var i=arr.length-1;i>=0;i--){newArr[newArr.length]=arr[i];}return newArr;
}
rever([1,2,3,4,5]);