js将金额转成大写金额

       function Chinese(){
            /* var num= $(dialogStruct.iframe.contentDocument.getElementById("contractAmount ")).val(); */
            var num= $("#contractAmount ").val();

                var AA = new Array("零","壹","贰","叁","肆","伍","陆","柒","捌","玖");
                var BB = new Array("","拾","佰","仟","萬","億","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--){
                    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){
                    re += BB[6];
                    for(var i=0; i<a[1].length; i++){
                        re += AA[a[1].charAt(i)] + CC[i];
                        if(i==2) break;
                    }
                    if(a[1].charAt(0)=="0" && a[1].charAt(1)=="0"){
                        re+="元整";
                    }
                }else{
                    re+="元整";
                }
                $("#views").html(re);
        }