把0-9 的數字轉成大寫

//把0-9 的數字轉成大寫
//Digit:要轉換的數字
//調用實例:CONVERTDIGIT('1') return:ONE
function  CONVERTDIGIT(Digit)
{
    var returnvalue="";
    Digit=Digit+"";
    switch (Digit)
    {
          case "0":
             returnvalue = "ZERO";
             break;
          case "1":
             returnvalue = "ONE";
             break;
          case "2":
             returnvalue = "TWO";
             break;
          case "3":
             returnvalue = "THREE";
             break;
          case "4":
             returnvalue = "FOUR";
             break;
          case "5":
             returnvalue = "FIVE";
             break;
          case "6":
             returnvalue = "SIX";
             break;
          case "7":
             s_ReturnDigit = "SEVEN";
             break;
          case "8":
             s_ReturnDigit = "EIGHT";
             break;
          case "9":
             returnvalue = "NINE";
             break;
    }
    return returnvalue;
}