<script language="javascript" type="text/javascript">
       function Arabia_to_Chinese(Num) {
           for (i = Num.length - 1; i >= 0; i--) {
               Num = Num.replace(",", "")//替换tomoney()中的“,”
               Num = Num.replace(" ", "")//替换tomoney()中的空格
           }
           Num = Num.replace("￥", "")//替换掉可能出现的￥字符
           if (isNaN(Num)) { //验证输入的字符是否为数字
               alert("请检查小写金额是否正确");
               return;
           }
           //---字符处理完毕，开始转换，转换采用前后两部分分别转换---//
           part = String(Num).split(".");
           newchar = "";
           //小数点前进行转化
           for (i = part[0].length - 1; i >= 0; i--) {
               if (part[0].length > 10) { alert("位数过大，无法计算");return ""; } //若数量超过拾亿单位，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 = "贰" + tmpnewchar; break;
                   case "3": tmpnewchar = "叁" + tmpnewchar; break;
                   case "4": tmpnewchar = "肆" + tmpnewchar; break;
                   case "5": tmpnewchar = "伍" + tmpnewchar; break;
                   case "6": tmpnewchar = "陆" + 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 + "万"; 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 + "亿"; break;
                   case 9: tmpnewchar = tmpnewchar + "拾"; break;
               }
               newchar = tmpnewchar + newchar;
           }
           //小数点之后进行转化
           if (Num.indexOf(".") != -1) {
               if (part[1].length > 2) {
                   alert("小数点之后只能保留两位,系统将自动截段");
                   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 = "贰" + tmpnewchar; break;
                       case "3": tmpnewchar = "叁" + tmpnewchar; break;
                       case "4": tmpnewchar = "肆" + tmpnewchar; break;
                       case "5": tmpnewchar = "伍" + tmpnewchar; break;
                       case "6": tmpnewchar = "陆" + 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;
               }
           }
           //替换所有无用汉字
           while (newchar.search("零零") != -1)
               newchar = newchar.replace("零零", "零");
           newchar = newchar.replace("零亿", "亿");
           newchar = newchar.replace("亿万", "亿");
           newchar = newchar.replace("零万", "万");
           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"
         //  document.write(newchar);
           return newchar;

       }
   </script>

参考文献:http://17jquery.com/javascript/27846/