JS金额小写转大写

$(document).ready(function () {
$("[id$='txtaiRefundMoney']").change(function () {
$("[id$='txtaiRefundMonryCapital']").val(atoc($("[id$='txtaiRefundMoney']").val()));
});
});

function atoc(numberValue) {
var numberValue = new String(Math.round(numberValue * 100)); // 数字金额
var chineseValue = ""; // 转换后的汉字金额
var String1 = "零壹贰叁肆伍陆柒捌玖"; // 汉字数字
var String2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; // 对应单位
var len = numberValue.length; // numberValue 的字符串长度
var Ch1; // 数字的汉语读法
var Ch2; // 数字位的汉字读法
var nZero = 0; // 用来计算连续的零值的个数
var String3; // 指定位置的数值
if (len > 15) {
alert("超出计算范围");
return "";
}
if (numberValue == 0) {
chineseValue = "零元整";
return chineseValue;
}
String2 = String2.substr(String2.length - len, len); // 取出对应位数的STRING2的值
for (var i = 0; i < len; i++) {
String3 = parseInt(numberValue.substr(i, 1), 10); // 取出需转换的某一位的值
if (i != (len - 3) && i != (len - 7) && i != (len - 11) && i != (len - 15)) {
if (String3 == 0) {
Ch1 = "";
Ch2 = "";
nZero = nZero + 1;
}
else if (String3 != 0 && nZero != 0) {
Ch1 = "零" + String1.substr(String3, 1);
Ch2 = String2.substr(i, 1);
nZero = 0;
}
else {
Ch1 = String1.substr(String3, 1);
Ch2 = String2.substr(i, 1);
nZero = 0;
}
}
else { // 该位是万亿，亿，万，元位等关键位
if (String3 != 0 && nZero != 0) {
Ch1 = "零" + String1.substr(String3, 1);
Ch2 = String2.substr(i, 1);
nZero = 0;
}
else if (String3 != 0 && nZero == 0) {
Ch1 = String1.substr(String3, 1);
Ch2 = String2.substr(i, 1);
nZero = 0;
}
else if (String3 == 0 && nZero >= 3) {
Ch1 = "";
Ch2 = "";
nZero = nZero + 1;
}
else {
Ch1 = "";
Ch2 = String2.substr(i, 1);
nZero = nZero + 1;
}
if (i == (len - 11) || i == (len - 3)) { // 如果该位是亿位或元位，则必须写上
Ch2 = String2.substr(i, 1);
}
}
chineseValue = chineseValue + Ch1 + Ch2;
}
if (String3 == 0) { // 最后一位（分）为0时，加上“整”
chineseValue = chineseValue + "整";
}
return chineseValue;
}