//说明：javascript的加法结果会有误差，在两个浮点数相加的时候会比较明显。这个函数返回较为精确的加法结果。  //调用：accAdd(arg1,arg2)  //返回值：arg1加上arg2的精确结果      function accAdd(arg1, arg2) {      var r1, r2, m;      try {          r1 = (1 * arg1).toString().split(".")[1].length;      }      catch (e) {          r1 = 0;      }      try {          r2 = (1 * arg2).toString().split(".")[1].length;      }      catch (e) {          r2 = 0;      }      m = Math.pow(10, Math.max(r1, r2));      return (arg1 * m + arg2 * m) / m;  }              //说明：javascript的减法结果会有误差，在两个浮点数相加的时候会比较明显。这个函数返回较为精确的减法结果。  //调用：accSub(arg1,arg2)  //返回值：arg1减上arg2的精确结果      function accSub(arg1, arg2) {      return accAdd(arg1, -arg2);  }             //说明：javascript的乘法结果会有误差，在两个浮点数相乘的时候会比较明显。这个函数返回较为精确的乘法结果。  //调用：accMul(arg1,arg2)  //返回值：arg1乘以arg2的精确结果      function accMul(arg1, arg2) {      var m = 0, s1 = (1 * arg1).toString(), s2 = (1 * arg2).toString();      try {          m += s1.split(".")[1].length;      }      catch (e) {      }      try {          m += s2.split(".")[1].length;      }      catch (e) {      }      var ss = Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m);      return Math.round(ss * 100) / 100;  }             //说明：javascript的除法结果会有误差，在两个浮点数相除的时候会比较明显。这个函数返回较为精确的除法结果。  //调用：accDiv(arg1,arg2)  //返回值：arg1除以arg2的精确结果      function accDiv(arg1, arg2) {      var t1 = 0, t2 = 0, r1, r2;      try {          t1 = (1 * arg1).toString().split(".")[1].length;      }      catch (e) {      }      try {          t2 = (1 * arg2).toString().split(".")[1].length;      }      catch (e) {      }      with (Math) {          r1 = Number((1 * arg1).toString().replace(".", ""));          r2 = Number((1 * arg2).toString().replace(".", ""));          var ss = (r1 / r2) * pow(10, t2 - t1);          return Math.round(ss * 100) / 100;      }  }

//金额大小写转换  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 = "人民币";  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("Empty input!");    return "";  }  if (currencyDigits.match(/[^,.\d]/) != null) {    alert("Invalid characters in the input string!");    return "";  }  if ((currencyDigits).match(/^((\d{1,3}(,\d{3})*(.((\d{3},)*\d{1,3}))?)|(\d+(.\d+)?))$/) == null) {    alert("Illegal format of digit number!");    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("Too large a number to convert!");    return "";  }  // http://www.knowsky.com/ 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;  outputCharacters = outputCharacters;  return outputCharacters;  }//   //还原金额     function rmoney(s){       return parseFloat(s.replace(/[^\d\.-]/g,""));    }         //金额合计的格式化s为要格式化的参数（浮点型），n为小数点后保留的位数      function fmoney(s,n){      n = n>0 && n<=20 ? n : 2;      s = parseFloat((s+"").replace(/[^\d\.-]/g,"")).toFixed(n)+"";      var l = s.split(".")[0].split("").reverse(),       r = s.split(".")[1];       t = "";      for(i = 0;i<l.length;i++){          t+=l[i]+((i+1)%3==0 && (i+1) != l.length ? "," : "");       }      return t.split("").reverse().join("")+"."+r;  }