string latinify

String.prototype.latinify = function() {
        var map = {
            ä: "ae",
            ö: "oe",
            ü: "ue",
            Ä: "Ae",
            Ö: "Oe",
            Ü: "Ue"
        };
        var replacedString = "";
        for(var i = 0; i < this.length; i++) {
            replacedString += map[this[i]] || this[i];
        }
        return replacedString;
    };