JavaScript convert decimal number to words

/*
* Convert float(decimal) number supplied to words
* @param  float  n   The float number to be converted
* @return string
*/
export function convertNumberwithDecimalToWords(n) {
    // We have two decimal places for float, for example, 40.50 we convert into a string with two decimal "40.40", 50 we will have "50.00" then split using . to get array ['40', '40']
    var nums = n.toFixed(2).split('.')
    // nums[0] is a string. Can use convertNumberToWords(parseInt(nums[0])) parseInt("00") => 0 parseInt("05") => 5, but the integer will be converted to string in convertNumberToWords anyway
    var whole = convertNumberToWords(nums[0])
    // The second value in the array might be "00", "40", "05". ParseFloat("00") => will give float 0, ParseFloat("40") => 40, PraseFloat("05") => 5
    if (nums.length == 2 && parseFloat(nums[1]) > 0) {
        // nums[1] is a string. Can use convertNumberToWords(parseInt(nums[0])) parseInt("00") => 0 parseInt("05") => 5, but the integer will be converted to string in convertNumberToWords anyway
        var fraction = convertNumberToWords(nums[1])
        return whole + 'Dollars & ' + fraction + 'cents';
    } else {
        return whole + 'Dollars';
    }
}


/*
* Convert integer number supplied to words
* @param  int  amount  The integer number to be converted
* @return string
*/
export function convertNumberToWords(amount) {
    var words = new Array();
    words[0] = '';
    words[1] = 'One';
    words[2] = 'Two';
    words[3] = 'Three';
    words[4] = 'Four';
    words[5] = 'Five';
    words[6] = 'Six';
    words[7] = 'Seven';
    words[8] = 'Eight';
    words[9] = 'Nine';
    words[10] = 'Ten';
    words[11] = 'Eleven';
    words[12] = 'Twelve';
    words[13] = 'Thirteen';
    words[14] = 'Fourteen';
    words[15] = 'Fifteen';
    words[16] = 'Sixteen';
    words[17] = 'Seventeen';
    words[18] = 'Eighteen';
    words[19] = 'Nineteen';
    words[20] = 'Twenty';
    words[30] = 'Thirty';
    words[40] = 'Forty';
    words[50] = 'Fifty';
    words[60] = 'Sixty';
    words[70] = 'Seventy';
    words[80] = 'Eighty';
    words[90] = 'Ninety';
    amount = amount.toString();
    var atemp = amount.split(".");
    var number = atemp[0].split(",").join("");
    var n_length = number.length;
    var words_string = "";
    var value = "";
    if (n_length <= 9) {
        var n_array = new Array(0, 0, 0, 0, 0, 0, 0, 0, 0);
        var received_n_array = new Array();
        for (var i = 0; i < n_length; i++) {
            received_n_array[i] = number.substr(i, 1);
        }
        for (var i = 9 - n_length, j = 0; i < 9; i++, j++) {
            n_array[i] = received_n_array[j];
        }
        for (var i = 0, j = 1; i < 9; i++, j++) {
            if (i == 0 || i == 2 || i == 4 || i == 7) {
                if (n_array[i] == 1) {
                    n_array[j] = 10 + parseInt(n_array[j]);
                    n_array[i] = 0;
                }
            }
        }

        for (var i = 0; i < 9; i++) {
            if (i == 0 || i == 2 || i == 4 || i == 7) {
                value = n_array[i] * 10;
            } else {
                value = n_array[i];
            }
            if (value != 0) {
                words_string += words[value] + " ";
            }
            if ((i == 1 && value != 0) || (i == 0 && value != 0 && n_array[i + 1] == 0)) {
                words_string += "Crores ";
            }
            if ((i == 3 && value != 0) || (i == 2 && value != 0 && n_array[i + 1] == 0)) {
                words_string += "Lakhs ";
            }
            if ((i == 5 && value != 0) || (i == 4 && value != 0 && n_array[i + 1] == 0)) {
                words_string += "Thousand ";
            }
            if (i == 6 && value != 0 && (n_array[i + 1] != 0 && n_array[i + 2] != 0)) {
                words_string += "Hundred and ";
            } else if (i == 6 && value != 0) {
                words_string += "Hundred ";
            }
        }
        words_string = words_string.split("  ").join(" ");
    }
    return words_string;
}