Biegral Blog

 //小数格式化(不四舍五入，截取),num是要格式话的数字，len是要保留的小数位数
        function cutXiaoNum(num, len) {
            var numStr = num.toString();
            if (len == null || len == undefined) {
                len = numStr.length;
            }
            var index = numStr.indexOf('.');
            if (index == -1) {
                index = numStr.length;
                numStr += ".0000000000000";
            } else{
                numStr += "0000000000000";
            }
            var newNum = numStr.substring(0, index + len + 1);
            return newNum;
        }