lzl124631x

String.prototype.toUnicode = function(){
    var result = "";
    for(var i = 0; i < this.length; i++){
        result += "\\u" + ("000" + this[i].charCodeAt(0).toString(16)).substr(-4);
    }
    return result;
};

"みどりいろ".toUnicode();       //"\u307f\u3069\u308a\u3044\u308d"
"Mi Do Ri I Ro".toUnicode();  //"\u004d\u0069\u0020\u0044\u006f\u0020\u0052\u0069\u0020\u0049\u0020\u0052\u006f"