JavaScript------保留两位小数

转载:

http://www.cnblogs.com/446557021/archive/2011/10/13/2211047.html

<script language="javascript">var a=2.1512131231231321;  
   document.write("两位小数点:"+a.toFixed(2)+"<br>四位小数点"+a.toFixed(4));  
</script>