// https://stackoverflow.com/a/18650828
function formatBytes(bytes, decimal) {
    if (0 == bytes)
        return "0 bytes";
    var c = 1024;
    var d = decimal || 2;
    var e = ["bytes", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"];
    var f = Math.floor(Math.log(bytes) / Math.log(c));
    return "<b>" + parseFloat((bytes / Math.pow(c, f)).toFixed(d)) + "</b> " + e[f]
}

function print_money(amount, decimal_point) {
    var s1 = String(amount);
    while (s1.length < decimal_point+1)
        s1 = "0" + s1;
    var s2 = "";
    for (var i = 0; i < decimal_point; ++i)
        s2 = s1[s1.length - 1 - i] + s2;
    s2 = "." + s2;
    for (var i = 0; i < s1.length - decimal_point; ++i) {
        if (i > 0 && i % 3 == 0)
            s2 = "," + s2;
        s2 = s1[s1.length - 1 - decimal_point - i] + s2
    }
    return s2;
}