//unicode為1個接收數據，串口收到的字符編碼放在該數組中 function UnicodeToUtf8(unicode) {   var uchar;   var utf8str = "";   var i;   for(i=0; i<unicode.length;i+=2){          uchar = (unicode[i]<<8) | unicode[i+1];        //UNICODE為2字節編碼，一次讀入2個字節     utf8str = utf8str + String.fromCharCode(uchar);  //使用String.fromCharCode強制轉換   }   return utf8str; } function Utf8ToUnicode(strUtf8) {   var i,j;   var uCode;   var temp = new Array();   for(i=0,j=0; i<strUtf8.length; i++){     uCode = strUtf8.charCodeAt(i);     if(uCode<0x100){         //ASCII字符       temp[j++] = 0x00;       temp[j++] = uCode;     }else if(uCode<0x10000){       temp[j++] = (uCode>>8)&0xff;       temp[j++] = uCode&0xff;     }else if(uCode<0x1000000){       temp[j++] = (uCode>>16)&0xff;       temp[j++] = (uCode>>8)&0xff;       temp[j++] = uCode&0xff;     }else if(uCode<0x100000000){       temp[j++] = (uCode>>24)&0xff;       temp[j++] = (uCode>>16)&0xff;       temp[j++] = (uCode>>8)&0xff;       temp[j++] = uCode&0xff;     }else{       break;     }   }   temp.length = j;   return temp; }