Format currency using javascript /JQuery

In this article,I will explain  how to Format currency using javascript.it is very easy to format currency in javascript.I have written simple function to format currency in JavaScript.

Example:
<html>
<head>
<title>Format currency (comma seperated) using javascript</title>
<script language="javascript" type="text/javascript">
function FormattedCurrency(currency)
{
var split_num = currency.split('.',2)//Seperate Integer Number and decimal number.
 if(isNaN(parseInt(split_num[0])))
{
 return 'Please Enter Amount'; 
}
else    
    if(parseInt(split_num[0]) < 0)
{
var  minus_nummber = '-'; 
}
else
var minus_nummber = '';
 integer = Math.abs(parseInt(split_num[0]));
    var number = new String(integer);
    var num = [];


while(number.length > 3)
{
 var number1 = number.substr(number.length-3);
 num.unshift(number1);
 number = number.substr(0,number.length-3);
    }
    if(number.length > 0) { num.unshift(number); }
    number = num.join(',');


   if(parseInt(split_num[1]).length < 1) 
   {
    currency = number; 
    }
   else 
   {
    currency = number + '.' + parseInt(split_num[1]); }
    final_amount = minus_nummber + currency;
    alert(final_amount);
}
var currency="1300.40";
var currency=FormattedCurrency(currency);
</script>
</head>
</html>