[F8] reformat integer to money string

I'm working in flash 8 and as1.

I'm using this code that I found on the web..

Basically I'm just reformatting an integer to a money formatted string. The thing this code doesn’t do is add commas to the number. (Example: 1000 will return $1000.00)

Does anybody know how I may update this code to include commas in its output?

Thanks!

PHP Code:

---

function moneyFormat(num){
        valor = String (Math.round(num * 100) / 100);
        dot = valor.indexOf(".");
        money = "$";
        if(dot == -1){
                valor += ".0";
        }
        temp = valor.split(".");
        addDecimals = 2 - temp[1].length;
        for(i=1; i<= addDecimals; i++){
                valor += "0";
        }
        return money+valor;
}; 


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split valor into an array, then loop backwards over the resulting array in steps of 3 and use splice to put a comma in. then return array.toString();

dont forget to start the loop at valor.length - 3 to account for the cents and decimal.