JS函数实现金额小写转大写

    ///<summery>小写金额转化大写金额</summery>
    function AmountLtoU(amount) {
        if (isNaN(amount) || amount >= 1000000000000) return "无效金额！";  //数值最大不超过1万亿
        var sPrefix = amount < 0 ? "(负)" : "";                             //将负号‘-’显示成汉字‘(负)’
        var sAmount = Math.abs(amount).toFixed(2);                          //格式化成两位小数格式（两位小数对应“'角”和“分”）
        var sUnit = '仟佰拾亿仟佰拾万仟佰拾元角分';                         //14个权位单位
        var sCapital = '零壹贰叁肆伍陆柒捌玖';                              //10个大写数字
        sAmount = sAmount.replace(".", "");                                 //去除小数点（使数字与权位对应）
        sUnit = sUnit.substr(sUnit.length - sAmount.length);                //截取权位
        var sOutput = "";  
        for (var i = 0, len = sAmount.length; i < len; i++) {               //拼接数字与权位单位
            sOutput += sCapital.substr(sAmount.substr(i, 1), 1) + sUnit.substr(i, 1);
        } 
        return sPrefix + sOutput.replace(/零角零分$/, '整').replace(/零[仟佰拾]/g, '零').replace(/零{2,}/g, '零')
                                .replace(/零([亿|万])/g, '$1').replace(/零+元/, '元').replace(/亿零{0,3}万/, '亿').replace(/^元/, "零元");
    };