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网页编程－数字转大写金额

<SCRIPT type="text/javascript" Charset="GB2312">
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_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("请输入要转换的数字!");
		return "";
	}
	if (currencyDigits.match(/[^,.\d]/) != null) {
		alert("数字中含有非法字符!");
		return "";
	}
	if ((currencyDigits).match(/^((\d{1,3}(,\d{3})*(.((\d{3},)*\d{1,3}))?)|(\d+(.\d+)?))$/) == null) {
		alert("错误的数字格式!");
		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("超出转换最大范围!");
		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 name=Digits size="15" value="1000001" > <INPUT id=Convert onclick="Result.value = convertCurrency(Digits.value);" type=button value=Convert name=Convert height="185659256"> <INPUT id=Result size=30 name=Result > </P>