比較經典的程式碼！

保留2位小數，否則會出錯！

整數金額必須為格式：12345.00 否則會出錯！

如果結合ASP的FormatCurrency,可解決這個問題！

 <script language="JavaScript" type="text/JavaScript">
function Arabia_to_Chinese(Num){
 for(i=Num.length-1;i>=0;i--)
 {
  Num = Num.replace(",","")//替換tomoney()中的“,”
  Num = Num.replace(" ","")//替換tomoney()中的空格
 }
 //Num = Num.replace("￥","")//替換掉可能出現的￥字元
 if(isNaN(Num)) { //驗證輸入的字元是否為數字
  alert("請檢查小寫金額是否正確");
  return;
 }
 //---字元處理完畢，開始轉換，轉換採用前後兩部分分別轉換---//
 part = String(Num).split(".");
 newchar = "";
 //小數點前進行轉化
 for(i=part[0].length-1;i>=0;i--){
 if(part[0].length > 10){ alert("位數過大，無法計算");return "";}//若數量超過拾億單位，提示
  tmpnewchar = ""
  perchar = part[0].charAt(i);
  switch(perchar){
    case "0": tmpnewchar="零" + tmpnewchar ;break;
    case "1": tmpnewchar="壹" + tmpnewchar ;break;
    case "2": tmpnewchar="貳" + tmpnewchar ;break;
    case "3": tmpnewchar="叄" + tmpnewchar ;break;
    case "4": tmpnewchar="肆" + tmpnewchar ;break;
    case "5": tmpnewchar="伍" + tmpnewchar ;break;
    case "6": tmpnewchar="陸" + tmpnewchar ;break;
    case "7": tmpnewchar="柒" + tmpnewchar ;break;
    case "8": tmpnewchar="捌" + tmpnewchar ;break;
    case "9": tmpnewchar="玖" + tmpnewchar ;break;
  }
  switch(part[0].length-i-1){
    case 0: tmpnewchar = tmpnewchar +"元" ;break;
    case 1: if(perchar!=0)tmpnewchar= tmpnewchar +"拾" ;break;
    case 2: if(perchar!=0)tmpnewchar= tmpnewchar +"佰" ;break;
    case 3: if(perchar!=0)tmpnewchar= tmpnewchar +"仟" ;break;
    case 4: tmpnewchar= tmpnewchar +"萬" ;break;
    case 5: if(perchar!=0)tmpnewchar= tmpnewchar +"拾" ;break;
    case 6: if(perchar!=0)tmpnewchar= tmpnewchar +"佰" ;break;
    case 7: if(perchar!=0)tmpnewchar= tmpnewchar +"仟" ;break;
    case 8: tmpnewchar= tmpnewchar +"億" ;break;
    case 9: tmpnewchar= tmpnewchar +"拾" ;break;
  }
  newchar = tmpnewchar + newchar;
 }
 //小數點之後進行轉化
// if(Num.indexOf(".")!=-1){
 if(part[1].length > 2) {
  alert("小數點之後只能保留兩位,系統將自動截段");
  part[1] = part[1].substr(0,2)
  }
 for(i=0;i<part[1].length;i++){
  tmpnewchar = ""
  perchar = part[1].charAt(i)
  switch(perchar){
    case "0": tmpnewchar="零" + tmpnewchar ;break;
    case "1": tmpnewchar="壹" + tmpnewchar ;break;
    case "2": tmpnewchar="貳" + tmpnewchar ;break;
    case "3": tmpnewchar="叄" + tmpnewchar ;break;
    case "4": tmpnewchar="肆" + tmpnewchar ;break;
    case "5": tmpnewchar="伍" + tmpnewchar ;break;
    case "6": tmpnewchar="陸" + tmpnewchar ;break;
    case "7": tmpnewchar="柒" + tmpnewchar ;break;
    case "8": tmpnewchar="捌" + tmpnewchar ;break;
    case "9": tmpnewchar="玖" + tmpnewchar ;break;
  }
  if(i==0)tmpnewchar =tmpnewchar + "角";
  if(i==1)tmpnewchar = tmpnewchar + "分";
  newchar = newchar + tmpnewchar;
 }
// }
 //替換所有無用漢字
 while(newchar.search("零零") != -1)
  newchar = newchar.replace("零零", "零");
 newchar = newchar.replace("零億", "億");
 newchar = newchar.replace("億萬", "億");
 newchar = newchar.replace("零萬", "萬");
 newchar = newchar.replace("零元", "元");
 newchar = newchar.replace("零角", "");
 newchar = newchar.replace("零分", "");

 if (newchar.charAt(newchar.length-1) == "元" || newchar.charAt(newchar.length-1) == "角")
  newchar = newchar+"整"
 return newchar;
}
//alert(Arabia_to_Chinese(22.6));
</script>
<script language="VBScript" type="text/VBScript">
function z()
document.all.form1.j2.value=Arabia_to_Chinese(document.all.form1.j1.value)
end function
</script>

<form name="form1" method="post" action="">
  <input type="text" name="j1" onKeyDown="if(event.keyCode==13){z()}">
  <input type="text" name="j2">
</form>