<script> function reversal(arr){ for(var i=0;i<arr.length/2;i++){ var temp=arr[i]; arr[i]=arr[arr.length-i-1]; arr[arr.length-i-1]=temp; } } var array=[1,2,3,4,5,6]; reversal(array); alert(array); </script>
<script> function reversal(arr){ for(var i=0;i<arr.length/2;i++){ var temp=arr[i]; arr[i]=arr[arr.length-i-1]; arr[arr.length-i-1]=temp; } } var array=[1,2,3,4,5,6]; reversal(array); alert(array); </script>
原文：https://www.cnblogs.com/yangguoe/p/8467820.html