jquery formatCurrency是一个对货币格式进行格式化输入控制、显示的一个jquery插件，可以对文本框输入进行货币合法性验证，并且支持对文本输入字符串进行格式化显示。（国内的会计记账法是保留两位小数，整数位每3个千位使用,号隔开）

1.引入jquery和插件(jquery省略)

 

2.使用插件API方法

// 如将页面所有表格的金额单元格格式化显示$('.label').formatCurrency();// $('.ageInput').toNumber();

 

如图

 

插件详细代码

//  This file is part of the jQuery formatCurrency Plugin.////    The jQuery formatCurrency Plugin is free software: you can redistribute it//    and/or modify it under the terms of the GNU General Public License as published //    by the Free Software Foundation, either version 3 of the License, or//    (at your option) any later version.//    The jQuery formatCurrency Plugin is distributed in the hope that it will//    be useful, but WITHOUT ANY WARRANTY; without even the implied warranty //    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the//    GNU General Public License for more details.////    You should have received a copy of the GNU General Public License along with //    the jQuery formatCurrency Plugin.  If not, see 
     .//    wiki http://code.google.com/p/jquery-formatcurrency/wiki/Usage(function($) {    $.formatCurrency = {};    $.formatCurrency.regions = [];    // default Region is en    $.formatCurrency.regions[''] = {        symbol: '',        positiveFormat: '%s%n',        negativeFormat: '(%s%n)',        decimalSymbol: '.',        digitGroupSymbol: ',',        groupDigits: true    };    $.fn.formatCurrency = function(destination, settings) {        if (arguments.length == 1 && typeof destination !== "string") {            settings = destination;            destination = false;        }        // initialize defaults        var defaults = {            name: "formatCurrency",            colorize: false,            region: '',            global: true,            roundToDecimalPlace: 2, // roundToDecimalPlace: -1; for no rounding; 0 to round to the dollar; 1 for one digit cents; 2 for two digit cents; 3 for three digit cents; ...            eventOnDecimalsEntered: false        };        // initialize default region        defaults = $.extend(defaults, $.formatCurrency.regions['']);        // override defaults with settings passed in        settings = $.extend(defaults, settings);        // check for region setting        if (settings.region.length > 0) {            settings = $.extend(settings, getRegionOrCulture(settings.region));        }        settings.regex = generateRegex(settings);        return this.each(function() {            $this = $(this);            // get number            var num = '0';            num = $this[$this.is('input, select, textarea') ? 'val' : 'html']();            //identify '(123)' as a negative number            if (num.search('\\(') >= 0) {                num = '-' + num;            }            if (num === '' || (num === '-' && settings.roundToDecimalPlace === -1)) {                return;            }            // if the number is valid use it, otherwise clean it            if (isNaN(num)) {                // clean number                num = num.replace(settings.regex, '');                                if (num === '' || (num === '-' && settings.roundToDecimalPlace === -1)) {                    return;                }                                if (settings.decimalSymbol != '.') {                    num = num.replace(settings.decimalSymbol, '.');  // reset to US decimal for arithmetic                }                if (isNaN(num)) {                    num = '0';                }            }                        // evalutate number input            var numParts = String(num).split('.');            var isPositive = (num == Math.abs(num));            var hasDecimals = (numParts.length > 1);            var decimals = (hasDecimals ? numParts[1].toString() : '0');            var originalDecimals = decimals;                        // format number            num = Math.abs(numParts[0]);            num = isNaN(num) ? 0 : num;            if (settings.roundToDecimalPlace >= 0) {                decimals = parseFloat('1.' + decimals); // prepend "0."; (IE does NOT round 0.50.toFixed(0) up, but (1+0.50).toFixed(0)-1                decimals = decimals.toFixed(settings.roundToDecimalPlace); // round                if (decimals.substring(0, 1) == '2') {                    num = Number(num) + 1;                }                decimals = decimals.substring(2); // remove "0."            }            num = String(num);            if (settings.groupDigits) {                for (var i = 0; i < Math.floor((num.length - (1 + i)) / 3); i++) {                    num = num.substring(0, num.length - (4 * i + 3)) + settings.digitGroupSymbol + num.substring(num.length - (4 * i + 3));                }            }            if ((hasDecimals && settings.roundToDecimalPlace == -1) || settings.roundToDecimalPlace > 0) {                num += settings.decimalSymbol + decimals;            }            // format symbol/negative            var format = isPositive ? settings.positiveFormat : settings.negativeFormat;            var money = format.replace(/%s/g, settings.symbol);            money = money.replace(/%n/g, num);            // setup destination            var $destination = $([]);            if (!destination) {                $destination = $this;            } else {                $destination = $(destination);            }            // set destination            $destination[$destination.is('input, select, textarea') ? 'val' : 'html'](money);            if (                hasDecimals &&                 settings.eventOnDecimalsEntered &&                 originalDecimals.length > settings.roundToDecimalPlace            ) {                $destination.trigger('decimalsEntered', originalDecimals);            }            // colorize            if (settings.colorize) {                $destination.css('color', isPositive ? 'black' : 'red');            }        });    };    // Remove all non numbers from text    $.fn.toNumber = function(settings) {        var defaults = $.extend({            name: "toNumber",            region: '',            global: true        }, $.formatCurrency.regions['']);        settings = jQuery.extend(defaults, settings);        if (settings.region.length > 0) {            settings = $.extend(settings, getRegionOrCulture(settings.region));        }        settings.regex = generateRegex(settings);        return this.each(function() {            var method = $(this).is('input, select, textarea') ? 'val' : 'html';            $(this)[method]($(this)[method]().replace('(', '(-').replace(settings.regex, ''));        });    };    // returns the value from the first element as a number    $.fn.asNumber = function(settings) {        var defaults = $.extend({            name: "asNumber",            region: '',            parse: true,            parseType: 'Float',            global: true        }, $.formatCurrency.regions['']);        settings = jQuery.extend(defaults, settings);        if (settings.region.length > 0) {            settings = $.extend(settings, getRegionOrCulture(settings.region));        }        settings.regex = generateRegex(settings);        settings.parseType = validateParseType(settings.parseType);        var method = $(this).is('input, select, textarea') ? 'val' : 'html';        var num = $(this)[method]();        num = num ? num : "";        num = num.replace('(', '(-');        num = num.replace(settings.regex, '');        if (!settings.parse) {            return num;        }        if (num.length == 0) {            num = '0';        }        if (settings.decimalSymbol != '.') {            num = num.replace(settings.decimalSymbol, '.');  // reset to US decimal for arthmetic        }        return window['parse' + settings.parseType](num);    };    function getRegionOrCulture(region) {        var regionInfo = $.formatCurrency.regions[region];        if (regionInfo) {            return regionInfo;        }        else {            if (/(\w+)-(\w+)/g.test(region)) {                var culture = region.replace(/(\w+)-(\w+)/g, "$1");                return $.formatCurrency.regions[culture];            }        }        // fallback to extend(null) (i.e. nothing)        return null;    }    function validateParseType(parseType) {        switch (parseType.toLowerCase()) {            case 'int':                return 'Int';            case 'float':                return 'Float';            default:                throw 'invalid parseType';        }    }        function generateRegex(settings) {        if (settings.symbol === '') {            return new RegExp("[^\\d" + settings.decimalSymbol + "-]", "g");        }        else {            var symbol = settings.symbol.replace('$', '\\$').replace('.', '\\.');                    return new RegExp(symbol + "|[^\\d" + settings.decimalSymbol + "-]", "g");        }        }})(jQuery);