js 将阿拉伯数字翻译成中文的大写数字

//将阿拉伯数字翻译成中文的大写数字
function moneyToCapital(sourceId,targetId)  
{
  var source=document.getElementById(sourceId);
  var target=document.getElementById(targetId);
  var num=source.value;
  
   if(!/^d*(.d*)?$/.test(num)) throw(new Error(-1, "Number is wrong!"));
 
   var AA = new Array("零","壹","贰","叁","肆","伍","陆","柒","捌","玖");
   var BB = new Array("","拾","佰","仟","?","?","圆","");
   var CC = new Array("角", "分", "厘");
    
   var a = (""+ num).replace(/(^0*)/g, "").split("."), k = 0, re = "";
 
   for(var i=a[0].length-1; i>=0; i--) //author: meizz
   {
   switch(k)
   {
   case 0 : re = BB[7] + re; break;
   case 4 : if(!new RegExp("0{4}\d{"+ (a[0].length-i-1) +"}$").test(a[0]))
   re = BB[4] + re; break;
   case 8 : re = BB[5] + re; BB[7] = BB[5]; k = 0; break;
   }
   if(k%4 == 2 && a[0].charAt(i)=="0" && a[0].charAt(i+2) != "0") re = AA[0] + re;
   if(a[0].charAt(i) != 0) re = AA[a[0].charAt(i)] + BB[k%4] + re; k++;
   }
 
   if(a.length>1) //加上小数部分(如果有小数部分)
   {
   re += BB[6];
   for(var i=0; i<a[1].length; i++)
   {
   re += AA[a[1].charAt(i)] + CC[i];
   if(i==2) break;
   }
   }
   // return re;
  target.value= re ;
}