Need help for number to words in adobe acrobat form

//This is my code now.

var th = ['', 'thousand', 'million', 'billion', 'trillion'];

var dg = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'];

var tn = ['ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'];

var tw = ['twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'];

function toWords(s) {

    s = s.toString();

    s = s.replace(/[\, ]/g, '');

    if (s != parseFloat(s)) return 'not a number';

    var x = s.indexOf('.');

    if (x == -1) x = s.length;

    if (x > 15) return 'too big';

    var n = s.split('');

    var str = '';

    var sk = 0;

    for (var i = 0; i < x; i++) {

        if ((x - i) % 3 == 2) {

            if (n == '1') {

                str += tn[Number(n[i + 1])] + ' ';

                i++;

                sk = 1;

            } else if (n != 0) {

                str += tw[n - 2] + ' ';

                sk = 1;

            }

        } else if (n != 0) {

            str += dg[n] + ' ';

            if ((x - i) % 3 == 0) str += 'hundred ';

            sk = 1;

        }

        if ((x - i) % 3 == 1) {

            if (sk) str += th[(x - i - 1) / 3] + ' ';

            sk = 0;

        }

    }

    if (x != s.length) {

        var y = s.length;

        str += 'AND '+ '/100 ';

        for (var i = x + 1; i < y; i++) str += dg[n] + ' ';

    }

    return str.replace(/\s+/g, ' ');

}

//for 150.23, it shows "one hundred fifty AND /100 two three ", I would like to make it to "one hundred fifty AND 23/100"

//Value s will only have two decimals. Is pre-cuted to two decimals by another function.

//I have been working on it but can't manage to find a solution.

//Help would be very appreciate as I'm beginner in programming.

//Thank you