JavaScript將輸入的數字金額轉換成對應的中文大寫金額

// 將輸入的數字金額轉換成對應的中文大寫金額
// idNumber輸入的數字金額，idCHN輸出的中文大寫金額
function TransformNumberIntoCHN(idNumber, idCHN) {
    var number = document.getElementById(idNumber).value;
    if (!/^(0|[1-9]\d*)(\.\d{1,2})?$/.test(number)) {
        document.getElementById(idCHN).value = "";
        document.getElementById(idNumber).value = "";
        return false;
    }
    var unit = "仟佰拾億仟佰拾萬仟佰拾元角分", str = "";
    number += "00";
    var point = number.indexOf('.');
    if (point >= 0) {
        number = number.substring(0, point) + number.substr(point + 1, 2);
    }
    unit = unit.substr(unit.length - number.length);
    for (var i = 0; i < number.length; i++) {
        str += '零壹貳叄肆伍陸柒捌玖'.charAt(number.charAt(i)) + unit.charAt(i);
    }
    //document.getElementById(idCHN).value = str.replace(/零(仟|佰|拾|角)/g, "零").replace(/(零)+/g, "零").replace(/零(萬|億|元)/g, "$1").replace(/(億)萬|壹(拾)/g, "$1$2").replace(/^元零?|零分/g, "").replace(/元$/g, "元整");
    document.getElementById(idCHN).value = str.replace(/零(仟|佰|拾|角)/g, "零").replace(/(零)+/g, "零").replace(/零(萬|億|元)/g, "$1").replace(/(億)萬|(拾)/g, "$1$2").replace(/^元零?|零分/g, "").replace(/元$/g, "元整");
}