function isInt (str) {

	var i = parseInt (str);

	if (isNaN (i)) return false;

	i = i . toString ();
	if (i != str) return false;

	return true;

}

function num_format (x) {

        var str = new String (x);
        var newstr = "";
        var nr_caractere = str.length;

        if (nr_caractere <= 3)
                return str;

        for (var i = 0; i < nr_caractere; i++) {
                if (! ((nr_caractere - i) % 3) && i > 0)
                        newstr = newstr + ".";
                newstr = newstr + str.charAt(i);
        }

        return (newstr);

}

function forceNum (number) {

	return number.length ? number : 0;

}