js对数组中的数字从小到大排序实现代码

答案：例子 1 
In this example we will create an array and sort it alphabetically: 
 
<script type="text/javascript"> 
var arr = new Array(6) 
arr[0] = "Jani" 
arr[1] = "Hege" 
arr[2] = "Stale" 
arr[3] = "Kai Jim" 
arr[4] = "Borge" 
arr[5] = "Tove" 
document.write(arr + "<br>") 
document.write(arr.sort()) 
</script> 

  [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
 
输出： 

Jani,Hege,Stale,Kai Jim,Borge,Tove 
Borge,Hege,Jani,Kai Jim,Stale,Tove例子 2 
In this example we will create an array and sort it alphabetically: 
 
<script type="text/javascript"> 
var arr = new Array(6) 
arr[0] = "10" 
arr[1] = "5" 
arr[2] = "40" 
arr[3] = "25" 
arr[4] = "1000" 
arr[5] = "1" 
document.write(arr + "<br>") 
document.write(arr.sort()) 
</script> 

  [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
 
输出： 

10,5,40,25,1000,1 
1,10,1000,25,40,5请注意，上面的代码没有按照数值的大小对数字进行排序，要实现这一点，就必须使用一个排序函数： 
 
<script type="text/javascript"> 
function sortNumber(a,b) 
{ 
return a - b 
} 

var arr = new Array(6) 
arr[0] = "10" 
arr[1] = "5" 
arr[2] = "40" 
arr[3] = "25" 
arr[4] = "1000" 
arr[5] = "1" 
document.write(arr + "<br>") 
document.write(arr.sort(sortNumber)) 
</script> 

  [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
 
输出： 

10,5,40,25,1000,1 
1,5,10,25,40,1000

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