3回答

• 

  慕仔3664579

  2016-07-27 16:35:57

  先定义一个中间变量，如var temp;

  然后交换要颠倒的元素的值，如temp=arr[i];arr[i]=arr[j];arr[j]=temp;

  0 0
• 

  灿白

  2015-07-23 14:00:17

  <script type="text/javascript">

     var myarr1= ["1","2",];

     document.write(myarr1.reverse())

  
  

  0 0
• 

  crasy

  2015-04-03 17:49:54

  var a = 1;

  var b = 2;

  var c;

  c=a;

  a=b;

  b=c;
  

  0 1