<input type="number" id="number" placeholder="Number...">
<h5 class="result"></h5>
$("input#number").keyup(function(){
var number = $(this).val();
var words = numberToWords(number);
$(".ntw .result").text(words);
});
function numberToWords(number) {
var digit = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'];
var elevenSeries = ['ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'];
var countingByTens = ['twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'];
var shortScale = ['', 'thousand', 'million', 'billion', 'trillion'];
number = number.toString();
number = number.replace(/[\, ]/g, '');
if (number != parseFloat(number)) return 'not a number';
var x = number.indexOf('.');
if (x == -1) x = number.length;
if (x > 15) return 'too big';
var n = number.split('');
var str = '';
var sk = 0;
for (var i = 0; i < x; i++) {
if ((x - i) % 3 == 2) {
if (n[i] == '1') {
str += elevenSeries[Number(n[i + 1])] + ' ';
i++;
sk = 1;
} else if (n[i] != 0) {
str += countingByTens[n[i] - 2] + ' ';
sk = 1;
}
} else if (n[i] != 0) {
str += digit[n[i]] + ' ';
if ((x - i) % 3 == 0) str += 'hundred ';
sk = 1;
}
if ((x - i) % 3 == 1) {
if (sk) str += shortScale[(x - i - 1) / 3] + ' ';
sk = 0;
}
}
if (x != number.length) {
var y = number.length;
str += 'point ';
for (var i = x + 1; i < y; i++) str += digit[n[i]] + ' ';
}
str = str.replace(/\number+/g, ' ');
str = str.replace(/\s+/g, '-').toLowerCase();
return "" + str.trim() + ".";
}