JS convert numbers to uppercase

transCnMoney(number){
       var CN_MONEY = "";
       var CN_UNIT = " Ten billion yuan and ten thousand yuan and ten cents ";
          number =  parseFloat(number).toFixed(2).toString();// The browser defaults to integer , Change the number to 2 Of significant digits float Type to string 
       var dot = number.indexOf('.');// Will be separated from the decimal point 
       if(dot >=0){
          number = number.substring(0,dot)+number.substr(dot+1,2);
          CN_UNIT=CN_UNIT.substr(CN_UNIT.length-number.length);
          for (var i = 0; i < number.length; i++){
           CN_MONEY += ' One two three four five six seven eight nine '.substr(number.substr(i, 1), 1) + CN_UNIT.substr(i, 1);
          }
          return CN_MONEY.replace(/ Zero angle, zero point $/, ' whole ').replace(/ zero [ Thousand hundred and ten ]/g, ' zero ').replace(/ zero {2,}/g, ' zero ').replace(/ zero ([ Billion | ten thousand ])/g, '$1').replace(/ zero + element /, ' element ').replace(/ 100 million {0,3} ten thousand /, ' Billion ').replace(/^ element /, " zero yuan ");
        }else{

        }
    },