JavaScript数字金额转中文大写金额

function numberToChineseCapital(number) {
    if (!/^(0|[1-9]\d*)(\.\d+)?$/.test(number)){
        return ‘数字格式不正确！‘;
    }
 
    number += ‘00‘;
 
    var unit = ‘千百十亿千百十万千百十元角分‘,
        pointIndex = number.indexOf(‘.‘),
        chineseCapitalStr = ‘‘;
 
    // 如果有小数，截取整数位和小数位
    if (pointIndex !== -1) {
        number = number.substring(0, pointIndex) + number.substr(pointIndex + 1, 2);
    }
 
    // 根据输入金额的长度匹配对应的单位
    unit = unit.substr(unit.length - number.length);
    for (var i = 0;i < number.length;i++){
        chineseCapitalStr += ‘零壹贰叁肆伍陆柒捌玖‘.charAt(number.charAt(i)) + unit.charAt(i);
    }
 
    return  chineseCapitalStr
            .replace(/零(千|百|拾|角)/g, ‘零‘)
            .replace(/(零)+/g, ‘零‘)
            .replace(/零(万|亿|元)/g, ‘$1‘)
            .replace(/(亿)万|元(拾)/g, ‘$1$2‘).replace(/^元零?|零分/g, ‘‘)
            .replace(/元$/g, ‘元整‘);
}
 
numberToChineseCapital(21324873.23); //"贰千壹百叁十贰万肆千捌百柒十叁元贰角叁分"