下载.js文件时出现乱码问题如何解决？

例如：
     //瀹氫綅鎼滅储鍥炶皟鏂规硶
    function abcHelpLocationSearchCallback(data){
        var grade = data.getGrade();
        if(grade >= 7){//褰撹繑鍥炴暟鎹?殑绾у埆灏忎簬3鏃讹紝璁や负涓嶇簿纭?            var lng = data.getLongitude();//鑾峰緱妯?潗鏍?            var lat = data.getLatitude();//鑾峰緱绾靛潗鏍?                //璋冪敤鏂规硶瀵瑰畾浣嶆墍鏍囧嚭鐨勭偣杩涜?鍒犻櫎
            abcHelperRemoveLocalInfo();
            var sContent = "";
            var pointStyle = new MStyle();//璋冪敤MStyle璁剧疆TIP绐楀彛鏍峰紡
            pointStyle.lineColor = 0xFFFFFF;//lineColor锛氱嚎鏉￠?鑹诧紝RGB棰滆壊鏍煎紡
            pointStyle.lineSize = 2;//lineSize锛氱嚎鏉＄殑瀹藉害銆傚崟浣嶆槸鍍忕礌
            pointStyle.fillColor = 0x4b8bd9;//fillColor锛氬～鍏呴?鑹诧紝RGB棰滆壊鏍煎紡
            pointStyle.fillOpacity = 80;//fillOpacity锛氬～鍏呯殑涓嶉