人民币大写转换
function convertCurrency(currencyDigits) {
// Constants:
var MAXIMUM_number = 99999999999.99;
// Predefine the radix characters and currency symbols for output:
var CN_zero = "零";
var CN_ONE = "壹";
var CN_TWO = "贰";
var CN_THREE = "叁";
var CN_FOUR = "肆";
var CN_FIVE = "伍";
var CN_SIX = "陆";
var CN_SEVEN = "柒";
var CN_EIGHT = "捌";
var CN_NINE = "玖";
var CN_TEN = "拾";
var CN_HUNDRED = "佰";
var CN_THOUSAND = "仟";
var CN_TEN_THOUSAND = "万";
var CN_HUNDRED_MILLION = "亿";
var CN_SYMBOL = "";
var CN_DOLLAR = "元";
var CN_TEN_CENT = "角";
var CN_CENT = "分";
var CN_INTEGER = "整";
// Variables:
var integral; // Represent integral part of digit number.
var decimal; // Represent decimal part of digit number.
var outputCharacters; // The output result.
var parts;
var digits, radices, bigRadices, decimals;
var zeroCount;
var i, p, d;
var quotient, modulus;
// Validate input string:
currencyDigits = currencyDigits.toString();
if (currencyDigits == "") {
alert("你没有输入，请输入数字");
return "";
}
if (currencyDigits.match(/[^,.d]/) != null) {
alert("你输入的不是数字，请输入数字");
return "";
}
if ((currencyDigits).match(/^((d{1,3}(,d{3})*(.((d{3},)*d{1,3}))?)|(d (.d )?))$/) == null) {
alert("你输入的汉字是非法格式，请重新输入!");
return "";
}
// Normalize the format of input digits:
currencyDigits = currencyDigits.replace(/,/g, ""); // Remove comma delimiters.
currencyDigits = currencyDigits.replace(/^0 /, ""); // Trim zeros at the beginning.
// Assert the number is not greater than the maximum number.
if (Number(currencyDigits) > MAXIMUM_NUMBER) {
alert("你输入的太长了");
return "";
}
// Process the coversion from currency digits to characters:
// Separate integral and decimal parts before processing coversion:
parts = currencyDigits.split(".");
if (parts.length > 1) {
integral = parts[0];
decimal = parts[1];
// Cut down redundant decimal digits that are after the second.
decimal = decimal.substr(0, 2);
}
else {
integral = parts[0];
decimal = "";
}
// Prepare the characters corresponding to the digits:
digits = new Array(CN_ZERO, CN_ONE, CN_TWO, CN_THREE, CN_FOUR, CN_FIVE, CN_SIX, CN_SEVEN, CN_EIGHT, CN_NINE);
radices = new Array("", CN_TEN, CN_HUNDRED, CN_THOUSAND);
bigRadices = new Array("", CN_TEN_THOUSAND, CN_HUNDRED_MILLION);
decimals = new Array(CN_TEN_CENT, CN_CENT);
// Start processing:
outputCharacters = "";
// Process integral part if it is larger than 0:
if (Number(integral) > 0) {
zeroCount = 0;
for (i = 0; i < integral.length; i ) {
p = integral.length - i - 1;
d = integral.substr(i, 1);
quotient = p / 4;
modulus = p % 4;
if (d == "0") {
zeroCount ;
}
else {
if (zeroCount > 0)
{
outputCharacters = digits[0];
}
zeroCount = 0;
outputCharacters = digits[Number(d)] radices[modulus];
}
if (modulus == 0 && zeroCount < 4) {
outputCharacters = bigRadices[quotient];
}
}
outputCharacters = CN_DOLLAR;
}
// Process decimal part if there is:
if (decimal != "") {
for (i = 0; i < decimal.length; i ) {
d = decimal.substr(i, 1);
if (d != "0") {
outputCharacters = digits[Number(d)] decimals[i];
}
}
}
// Confirm and return the final output string:
if (outputCharacters == "") {
outputCharacters = CN_ZERO CN_DOLLAR;
}
if (decimal == "") {
outputCharacters = CN_INTEGER;
}
outputCharacters = CN_SYMBOL outputCharacters;
return outputCharacters;
}
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