Tool.js（javascript帮助类）

//string.format

 $.format = function (source, params) {
            if (arguments.length == )
                return function () {
                    var args = $.makeArray(arguments);
                    args.unshift(source);
                    return $.validator.format.apply(this, args);
                };
            if (arguments.length >  && params.constructor != Array) {
                params = $.makeArray(arguments).slice();
            }
            if (params.constructor != Array) {
                params = [params];
            }
            $.each(params, function (i, n) {
                source = source.replace(new RegExp("\\{" + i + "\\}", "g"), (typeof n == 'undefined' || n == null) ? '' : n);
            });
            return source;
        }

//获取URL参数

 function request(name) {
            var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
            var r = window.location.search.substr().match(reg);
            if (r != null) return r[]; return null;
        }

//Cookie

 // 设置Cookie
        function setCookie(name, value) {
            var expires = (arguments.length > ) ? arguments[] : null;
            document.cookie = name + "=" + encodeURIComponent(value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + "";
        }

        // 获取Cookie
        function getCookie(name) {
            var value = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
            if (value != null) {
                return decodeURIComponent(value[]);
            } else {
                return null;
            }
        }

        // 删除cookie
        function removeCookie(name) {
            var expires = new Date();
            expires.setTime(expires.getTime() -  * );
            setCookie(name, "", expires);
        }

//运算

  // 浮点数加法运算
        function floatAdd(arg1, arg2) {
            var r1, r2, m;
            try {
                r1 = arg1.toString().split(".")[].length;
            } catch (e) {
                r1 = ;
            }
            try {
                r2 = arg2.toString().split(".")[].length;
            } catch (e) {
                r2 = ;
            }
            m = Math.pow(, Math.max(r1, r2));
            return (arg1 * m + arg2 * m) / m;
        }

        // 浮点数减法运算
        function floatSub(arg1, arg2) {
            var r1, r2, m, n;
            try {
                r1 = arg1.toString().split(".")[].length;
            } catch (e) {
                r1 =
            }
            try {
                r2 = arg2.toString().split(".")[].length;
            } catch (e) {
                r2 =
            }
            m = Math.pow(, Math.max(r1, r2));
            n = (r1 >= r2) ? r1 : r2;
            return ((arg1 * m - arg2 * m) / m).toFixed(n);
        }

        // 浮点数乘法运算
        function floatMul(arg1, arg2) {
            var m = , s1 = arg1.toString(), s2 = arg2.toString();
            try {
                m += s1.split(".")[].length;
            } catch (e) { }
            try {
                m += s2.split(".")[].length;
            } catch (e) { }
            return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(, m);
        }

        //保留2位四舍五入
        function changeTwoDecimal_f(x) {
            var f_x = parseFloat(x);
            if (isNaN(f_x)) {
                alert('function:changeTwoDecimal->parameter error');
                return false;
            }
            var f_x = Math.round(x * ) / ;
            var s_x = f_x.toString();
            var pos_decimal = s_x.indexOf('.');
            if (pos_decimal < ) {
                pos_decimal = s_x.length;
                s_x += '.';
            }
            while (s_x.length <= pos_decimal + ) {
                s_x += '';
            }
            return s_x;
        }

        // 浮点数除法运算
        function floatDiv(arg1, arg2) {
            var t1 = , t2 = , r1, r2;
            try {
                t1 = arg1.toString().split(".")[].length;
            } catch (e) { }
            try {
                t2 = arg2.toString().split(".")[].length;
            } catch (e) { }
            with (Math) {
                r1 = Number(arg1.toString().replace(".", ""));
                r2 = Number(arg2.toString().replace(".", ""));
                return (r1 / r2) * pow(, t2 - t1);
            }
        }

        // 设置数值精度
        function setScale(value, scale, roundingMode) {
            if (roundingMode.toLowerCase() == "roundhalfup") {
                return (Math.round(value * Math.pow(, scale)) / Math.pow(, scale)).toFixed(scale);
            } else if (roundingMode.toLowerCase() == "roundup") {
                return (Math.ceil(value * Math.pow(, scale)) / Math.pow(, scale)).toFixed(scale);
            } else {
                return (Math.floor(value * Math.pow(, scale)) / Math.pow(, scale)).toFixed(scale);
            }
        }

// html字符串转义

 function htmlEscape(htmlString) {
            htmlString = htmlString.replace(/&/g, '&');
            htmlString = htmlString.replace(/</g, '&lt;');
            htmlString = htmlString.replace(/>/g, '&gt;');
            htmlString = htmlString.replace(/'/g, '&acute;');
            htmlString = htmlString.replace(/"/g, '&quot;');
            htmlString = htmlString.replace(/\|/g, '&brvbar;');
            return htmlString;
        }