JS人民币金额转大写程序

//人民币金额转大写程序 JavaScript版     

//CopyRight Bardo QI     

    

function numToCny(num){     

    var capUnit = ['万','亿','万','圆',''];     

    var capDigit = { 2:['角','分',''], 4:['仟','佰','拾','']};     

    var capNum=['零','壹','贰','叁','肆','伍','陆','柒','捌','玖'];     

    if (((num.toString()).indexOf('.') > 16)||(isNaN(num)))      

        return '';     

    num = (Math.round(num*100)/100).toString();     

    num =((Math.pow(10,19-num.length)).toString()).substring(1)+num;     

    var i,ret,j,nodeNum,k,subret,len,subChr,CurChr=[];     

    for (i=0,ret='';i<5;i++,j=i*4+Math.floor(i/4)){     

        nodeNum=num.substring(j,j+4);     

        for(k=0,subret='',len=nodeNum.length;((k<len) && (parseInt(nodeNum.substring(k))!=0));k++){     

            CurChr[k%2] = capNum[nodeNum.charAt(k)]+((nodeNum.charAt(k)==0)?'':capDigit[len][k]);     

            if (!((CurChr[0]==CurChr[1]) && (CurChr[0]==capNum[0])))     

                if(!((CurChr[k%2] == capNum[0]) && (subret=='') && (ret=='')))     

                    subret += CurChr[k%2];     

        }     

        subChr = subret + ((subret=='')?'':capUnit[i]);     

        if(!((subChr == capNum[0]) && (ret=='')))     

            ret += subChr;     

    }     

    ret=(ret=='')? capNum[0]+capUnit[3]: ret;       

    return ret;     

}