js格式化金额.数字. 逗号分隔 ,##.00

function fmoney(s, n)
{
n = n > 0 && n <= 20 ? n : 2;
s = parseFloat((s + "").replace(/[^\d\.-]/g, "")).toFixed(n) + "";
var l = s.split(".")[0].split("").reverse(),
r = s.split(".")[1];
t = "";
for(i = 0; i < l.length; i ++ )
{
t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : "");
}
return t.split("").reverse().join("") + "." + r;
}

调用：fmoney("12345.675910", 3)，返回12,345.676
还原函数：
引用
function rmoney(s)
{
return parseFloat(s.replace(/[^\d\.-]/g, ""));
}
示例（可保存一下代码为html文件，运行查看效果）：
引用
<SCRIPT>
function fmoney(s, n)
{
n = n > 0 && n <= 20 ? n : 2;
s = parseFloat((s + "").replace(/[^\d\.-]/g, "")).toFixed(n) + "";
var l = s.split(".")[0].split("").reverse(),
r = s.split(".")[1];
t = "";
for(i = 0; i < l.length; i ++ )
{
t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : "");
}
return t.split("").reverse().join("") + "." + r;
}
function rmoney(s)
{
return parseFloat(s.replace(/[^\d\.-]/g, ""));
}
function g(id)
{
return document.getElementById(id);
}
window.onload = function()
{
var num,
txt = g("txt"),
txt2 = g("txt2"),
btn = g("btn"),
btn2 = g("btn2"),
span = g("span");
btn.onclick = function()
{
num = parseInt(g("num").value);
txt.value = fmoney(txt.value, num);
txt2.value = fmoney(txt2.value, num);
}
;
btn2.onclick = function()
{
num = parseInt(g("num").value);
span.innerHTML = "=" + fmoney(rmoney(txt.value) + rmoney(txt2.value), num);
}
;
}