/***
         * 数字格式化(适合金融产品截断小数位后展示)
         * @param num
         * @param pattern (标准格式：#,###.## 或#.## 或#,###00.00)
         * @param round 1=四舍五入后格式化；0=截断格式化
         * @returns {string}
         */
        function formatNumber(num, pattern, round) {
            if (num && !/^[\d\.]+$/g.test(num)) {
                console.log("the number format is incorrect！");
                return "";
            }

            var formatLeft = "";
            var formatRight = "";
            var symbolFlag = pattern.lastIndexOf(".");
            if (symbolFlag == -1) {
                formatLeft = pattern;
            } else {
                formatLeft = pattern.substring(0, pattern.lastIndexOf("."));
                formatRight = pattern.substring(pattern.lastIndexOf(".") + 1, pattern.length);
            }
            //四舍五入
            if (round == 1) {
                num = new Number(num).toFixed(formatRight.length);
            }

            //格式化数字
            var numberLeft = "";
            var numberRight = "";
            var numSymbolFlag = num.lastIndexOf(".");
            if (numSymbolFlag == -1) {
                var numberLeft = num;
            } else {
                var numberLeft = num.substring(0, num.lastIndexOf("."));
                var numberRight = num.substring(num.lastIndexOf(".") + 1, num.length);
            }

            var numberBucket = new Array();
            var formatFlag = formatLeft.indexOf("#,###");//千位符标记
            var count = 1;
            var len = numberLeft.length;
            for (var i = len; i > 0; i--) {
                numberBucket.unshift(numberLeft.charAt(i - 1));
                if (formatFlag != -1) {
                    if (count % 3 == 0 && count != len) {
                        numberBucket.unshift(',');
                    }
                }
                count++;
            }
            if (symbolFlag != -1) {
                numberBucket.push('.');
            }
            for (var i = 0; i < formatRight.length; i++) {
                if (formatRight.charAt(i) && numberRight.charAt(i)) {
                    numberBucket.push(numberRight.charAt(i))
                } else {
                    numberBucket.push("0");
                }
            }
            return numberBucket.join("");
        }

        //测试
        document.writeln(formatNumber("123456789.123456", "#") + "<br/>");
        document.writeln(formatNumber("123456789.123456", "#.#") + "<br/>");
        document.writeln(formatNumber("123456789.123456", "#,###") + "<br/>");
        document.writeln(formatNumber("123456789.123456", "#,###.#") + "<br/>");
        document.writeln(formatNumber("123456789.123456", "#,###00.00000000") + "<br/>");
        document.writeln(formatNumber("123456789.123456", "#,###.####") + "<br/>");
        document.writeln(formatNumber("1.50", "#.#", 1) + "<br/>");
        document.writeln(formatNumber("1.125456", "#.#", 1) + "<br/>");
        document.writeln(formatNumber("1.125456", "#.##", 1) + "<br/>");
        document.writeln(formatNumber("1.125456", "#.###", 1) + "<br/>");
        document.writeln(formatNumber("1.125456", "#.####", 1) + "<br/>");
        document.writeln(formatNumber("1.125456", "#.#####", 1) + "<br/>");