随机排序整个数组

<script type="text/javascript">  
//随机排序整个数组
var Arr1=[1,2,3,4,5,6,7,8,9,10,22,33,55,77,88,99];  
Arr1.sort(function(){return Math.random()>0.5?-1:1;});  
alert(Arr1);  
</script>