입력 <input type="text" id="input" value="" />원 <button onclick="change()">변환</button><br />

출력 <input type="text" id="output" />원

<script>

var number = '영일이삼사오육칠팔구';

var unit = {'십':10, '백':100, '천':1000, '만':10000, '억':100000000, '조':1000000000000};

function change() {

var input = document.getElementById('input').value;

var result = tmpResult = num = 0;

for (var i = 0; i < input.length; i++) {  

var token = input[i];

var check = number.indexOf(input[i]);

if (check == -1) { // 단위인 경우

if ('만억조'.indexOf(token)  == -1) {

tmpResult += (num != 0 ? num : 1) * unit[token];

} else {

tmpResult += num;

result += (tmpResult != 0 ? tmpResult : 1) * unit[token];

tmpResult = 0;

}

num = 0;

} else {

num = check;

}

}

document.getElementById('output').value = result + tmpResult + num;

}

</script>