<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);
} 
//格式化金額
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>

在線運行：

[Ctrl+A 全選注:引入外部Js需再刷新一下頁面才能執(zhí)行]

例2，使數(shù)字1111111變成11,111,111---和使11,111,111變成1111111---整數(shù)--

復制代碼代碼如下:

<!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 格式化金額的代碼---www.dbjr.com.cn</title>
<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">
<!--
body,td,th,input {
 font-size: 12px;
}
-->
</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>