用JavaScript將數字轉換為大寫金額

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var digitUppercase = function(n) {
    var fraction = ['角', '分'];
    var digit = [
        '零', '壹', '貳', '叁', '肆',
        '伍', '陸', '柒', '捌', '玖'
    ];
    var unit = [
        ['元', '萬', '億'],
        ['', '拾', '佰', '仟']
    ];
    var head = n < 0 ? '欠' : '';
    n = Math.abs(n);
    var s = '';
    for (var i = 0; i < fraction.length; i++) {
        s += (digit[Math.floor(n  10  Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '');
    }
    s = s || '整';
    n = Math.floor(n);
    for (var i = 0; i < unit[0].length && n > 0; i++) {
        var p = '';
        for (var j = 0; j < unit[1].length && n > 0; j++) {
            p = digit[n % 10] + unit[1][j] + p;
            n = Math.floor(n / 10);
        }
        s = p.replace(/(零.)零$/, '').replace(/^$/, '零') + unit[0][i] + s;
    }
    return head + s.replace(/(零.)零元/, '元')
        .replace(/(零.)+/g, '零')
        .replace(/^整$/, '零元整');
};

console.log(digitUppercase(7682.01)); //柒仟陸佰捌拾貳元壹分
console.log(digitUppercase(7682));  //柒仟陸佰捌拾貳元整
console.log(digitUppercase(951434677682.00)); //玖仟伍佰壹拾肆億叁仟肆佰陸拾柒萬柒仟陸佰捌拾貳元整</pre>