<script language="jscript">

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 = "人民币";
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("Empty input!");
return "";
}

if (currencyDigits.match(/[^,.\d]/) != null)
{
alert("Invalid characters in the input string!");
return "";
}

if ((currencyDigits).match(/^((\d
{1,3}(,\d
{3})*(.((\d
{3},)*\d
{1,3}))?)|(\d+(.\d+)?))$/) == null)
{
alert("Illegal format of digit number!");
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("Too large a number to convert!");
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;
}
</script>

<INPUT id="Digits" type="text" name="Digits" size=20>
<INPUT id="Convert" type="button" value="Convert" name="Convert" onclick="Result.value = convertCurrency(Digits.value);">
<INPUT id="Result" type="text" name="Result" size=60>
posted on
2007-02-12 17:20 mbskys 阅读(15) 评论()
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