js 数组排序

js 数组默认是按照数字的字母顺序排序

 <script type="text/javascript">
 var arr=['float', 'zindex', 'xy', 'absolute', 'blue', 'leo'];

 arr.sort();

 alert(arr);
 </script>
 <script type="text/javascript">
  var arr=[96, 8, 12, 72, 33, 118];

   arr.sort(function (num1, num2){
return num1-num2;
   });

  alert(arr);
  </script>