js金额数字格式化实现代码(三位加逗号处理保留两位置小数)
工作中很常用的东西：
例1，使数字1111111变成11,111,111.00，保留两位小数。
<html> <head> <script type="text/javascript"> function outputmoney(number) { number = number.replace(/\,/g, ""); if(isNaN(number) || number == "")return ""; number = Math.round(number * 100) / 100; if (number < 0) return '-' + outputdollars(Math.floor(Math.abs(number) - 0) + '') + outputcents(Math.abs(number) - 0); else return outputdollars(Math.floor(number - 0) + '') + outputcents(number - 0); } //格式化金额 function outputdollars(number) { if (number.length <= 3) return (number == '' ? '0' : number); else { var mod = number.length % 3; var output = (mod == 0 ? '' : (number.substring(0, mod))); for (i = 0; i < Math.floor(number.length / 3); i++) { if ((mod == 0) && (i == 0)) output += number.substring(mod + 3 * i, mod + 3 * i + 3); else output += ',' + number.substring(mod + 3 * i, mod + 3 * i + 3); } return (output); } } function outputcents(amount) { amount = Math.round(((amount) - Math.floor(amount)) * 100); return (amount < 10 ? '.0' + amount : '.' + amount); } script> head> <body> <input type=text maxlength="8" id="test" onblur="this.value=outputmoney(this.value);" > body> html>
例2，使数字1111111变成11,111,111---和使11,111,111变成1111111---整数--
doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312" />
<title>js 格式化金额的代码---www.jb51.nettitle>
<script language="javascript">
function tran(id)
{
var v, j, sj, rv = "";
v = id.value.replace(/,/g,"").split(".");
j = v[0].length % 3;
sj = v[0].substr(j).toString();
for (var i = 0; i < sj.length; i++)
{
rv = (i % 3 == 0) ? rv + "," + sj.substr(i, 1): rv + sj.substr(i, 1);
}
var rvalue = (v[1] == undefined) ? v[0].substr(0, j) + rv: v[0].substr(0, j) + rv + "." + v[1];
if (rvalue.charCodeAt(0) == 44)
{
rvalue = rvalue.substr(1);
}
id.value = rvalue;
}
function tran2(id)
{
var v;
v = id.value.replace(/,/g,"");
alert(v);
}
script>
<style type="text/css">
style>head>
<body>
<input name="tt" type="text" id="tt" size="80" onkeyup="tran(this)" />
<br/>
<input name="tt" type="text" id="tt2" size="80" onkeyup="tran2(this)" />
body>
html>