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(numToConvert, isDecimalPart=false) {

numToConvert = numToConvert.toString();

numToConvert = numToConvert.replace(/[\, ]/g, '');

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

var numLength = numToConvert.indexOf('.');

if (numLength == -1) numLength = numToConvert.length;

if (numLength > 15) return 'too big';

var numArray = numToConvert.split('');

var str = '';

var sk = 0;

for (var i = 0; i < numLength; i++) {

if ((numLength - i) % 3 == 2) {

if (numArray[i] == '1') {

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

i++;

sk = 1;

} else if (numArray[i] != 0) {

str += tw[numArray[i] - 2] + ' ';

sk = 1;

}

} else if (numArray[i] != 0) {

str += dg[numArray[i]] + ' ';

if ((numLength - i) % 3 == 0) {

str += 'hundred ';

if (numArray[i+2] != 0 ||

(numArray[i+2] == 0 && numArray[i+1] != 0)) str += 'and ';

}

sk = 1;

}

if ((numLength - i) % 3 == 1) {

if (sk) {

str += th[(numLength - i - 1) / 3] + ' ';

if (numArray[i+1] == 0 && numArray[i+2] == 0

&& numArray[i+3] != 0) str += 'and ';

}

sk = 0;

}

}

//Add the currency string. In the example below, we use the "Dollars". in your case, you may want to chgange it to Naira...

str += isDecimalPart ? '' : 'Dollars ';

if (numLength != numToConvert.length) {

var y = numToConvert.length;

var decimalPart = numToConvert.substring(numLength + 1);

decimalPart = decimalPart.length == 1 ? decimalPart + "0" : decimalPart;

str += toWords(decimalPart, true);

str += 'Cents ';

}

return str.replace(/\s+/g, ' ').toUpperCase();

}

if (this.amountField) return toWords(this.amountField);

else return "";