英文金额大写源码-javascript版

最近用到金额大写的代码，不过在网上找到的往往都是中文金额大写转换“壹贰叁肆伍陆柒捌玖”的那种，而需我要的是英文的，Thousand，Million那种。
baidu & google了一大轮找到了一个VBA版本的代码，加工完善之，成了我现在需要的Javascript版，pub出来请大家指教一下

<script language="javascript" type="text/javascript">
 /*
 Money2Letters - javascript版
 */
 function Id(v){return document.getElementById(v)}
 function funcMoney2Letters(){
     var iNum = Math.round(parseFloat(Id("txtInput").value*100))/100;//保留最后两位小数
  if(!iNum) {Id("divOutput").innerHTML="Error!";return;}
  var arrPlace = new Array( '', ' Thousand ', ' Million ', ' Billion ', ' Trillion ', ' Quadrillion ', ' Quintillion ', ' Sextillion ', ' Septillion ', ' Octillion ', ' Nonillion ', ' Decillion ', ' Undecillion ', ' Duodecillion ' );  
  var strNum = iNum+"";
  Id("txtInput").value = strNum;
  var strInt = strNum;//整数部分
  var idxPoint = strNum.indexOf('.'); 
  var Cents = "";
  if(idxPoint>0){//小数部分
   var strCents = strNum.substring(idxPoint+1);
   if(strCents.length == 1) strCents += "0"; 
   Cents = funcConvertTens(strCents);  
   strInt = strInt.substring(0,idxPoint);//整数部分
  } 
  var iCount = 0;
  var Dollars = ""; 
  while(strInt != ""){
   var Temp  = funcConvertHundreds(strInt.substring(strInt.length - 3));
  if(Temp != "")Dollars = Temp + arrPlace[iCount] + Dollars;
  if(Temp.length > 3){
   strInt = strInt.substring(0,strInt.length -3);
  }
  else
  {
   strInt = "";
  }
  iCount ++;
  if(iCount>=arrPlace.length) break;//数值太大无法处理
  }
 
  var res = "";
  if(Dollars == "One"){
   res = Dollars + " Dollar";
  }
  else if(Dollars != ""){
   res = Dollars + " Dollars";
  }
  if(Cents != "" && Dollars != "") res += " AND"
  if(Cents == ""){
   res += " Only";  
  }
  else if(Cents == "One"){
   res += " One Cent"; 
  }
  else{
   res += " "+Cents+" Cents";
  }
  Id("divOutput").innerHTML = res;
 }
 //处理十位数
 function funcConvertTens(v){
  var vLeft = parseInt(v.substring(0,1));
 var vRight = parseInt(v.substring(1));
 var res = "";
 if(vLeft == 1){
  switch(vRight){
   case 0:res = "Ten";break;
   case 1:res = "Eleven";break;
   case 2:res = "Twelve";break;
   case 3:res = "Thirteen";break;
   case 4:res = "Fourteen";break;
   case 5:res = "Fifteen";break;
   case 6:res = "Sixteen";break;
   case 7:res = "Seventeen";break;
   case 8:res = "Eighteen";break;
   case 9:res = "Nineteen";break;
  }
 }
 else if(vLeft>1){
  switch(vLeft){
   case 2:res = "Twenty";break;
   case 3:res = "Thirty";break;
   case 4:res = "Forty";break;
   case 5:res = "Fifty";break;
   case 6:res = "Sixty";break;
   case 7:res = "Seventy";break;
   case 8:res = "Eighty";break;
   case 9:res = "Ninety";break;
  }
 }
 if(vLeft == 0){
  res = funcConvertDigit(vRight);
 } 
 else if(vLeft>1 && vRight>0){
  res += "-" + funcConvertDigit(vRight)
 } 
 return res;
 }
 //处理个位数
 function funcConvertDigit(v){
  var res = "";
 switch(v){
  case 1:res = "One";break;
  case 2:res = "Tow";break;
  case 3:res = "Three";break;
  case 4:res = "Four";break;
  case 5:res = "Five";break;
  case 6:res = "Six";break;
  case 7:res = "Seven";break;
  case 8:res = "Eight";break;
  case 9:res = "Nine";break;
 }
 return res;
 }
 //处理百位数
 function funcConvertHundreds(v){
   var res = "";
  var vVal = parseInt(v); 
  if(vVal == 0) return res;
  v = "000"+v;
  v = v.substring(v.length -3)
  vRight = parseInt(v.substr(2,1));
  vLeft = parseInt(v.substr(0,1));
  vMid = parseInt(v.substr(1,1));
  if(vLeft>0){
   if(vMid + vRight > 0) {
   res = funcConvertDigit(vLeft) + " Hundred and ";
  }
  else {
   res = funcConvertDigit(vLeft) + " Hundred ";
  }
  }
  if(vMid>0){
   res += funcConvertTens(vMid + "" + vRight);
  }
  else{
   res += funcConvertDigit(vRight);
  }
  return res;
 }
 </script>