numberToComma(numtoconvert)
{
    x = string(numtoconvert);
    formatted = "";
    if(x.size <= 3)
        return numtoconvert;

    for( i = x.size - 3; i >= 0; i -= 3 )
    {
        if ( i > 0 )
            formatted += "," + getsubstr(x, i, 3 + i);
        else
            formatted += getsubstr(x, i, 3);
    }
    if ( i < 0 )
        formatted = getsubstr(x, 0, 3 + i) + formatted;

    return formatted;
}