Format Number

function formatNumber()
{
var obj = document.getElementById('txtExample');
var num = new NumberFormat();
num.setInputDecimal('.');
num.setNumber(obj.value); // obj.value is '2500'
num.setPlaces('0', false);
num.setCurrencyValue('Rp. ');
num.setCurrency(true);
num.setCurrencyPosition(num.LEFT_OUTSIDE);
num.setNegativeFormat(num.LEFT_DASH);
num.setNegativeRed(false);
num.setSeparators(true, ',', ',');
obj.value = num.toFormatted();

}
//-->
</script>
</head>
<form>

<input type="text" size="30" value="2500" id="txtExample" />
<input type="button" value="Format" onclick="formatNumber();" />
</form>
</body>
</html>