js 查找某个值在数组中出现的位置

  function  serarchArr(Arr, key) {//查找key值在數組arr中出現的索引位置
        var re = new RegExp(key, [""]);
        Arr = this.delSign(Arr.join("$"), "$").split("$");
        var msg = "┢" + Arr.join("┢") + "┢";
        var oSearch = "┢" + key + "┢";
        if (msg.indexOf(oSearch) != -1)
            return (Arr.join("@").replace(re, "┢").replace(/[^@┢]/g, "")).indexOf("┢");
        else
            return -1;
    }