function nav__cookie_enabled(){
        var cookieEnabled=(navigator.cookieEnabled)? true : false;
        //if not IE4+ nor NS6+
        if (typeof navigator.cookieEnabled=="undefined" && !cookieEnabled){
            document.cookie="testcookie"
            cookieEnabled = (document.cookie.indexOf("testcookie")!=-1)? true : false
        }
        return cookieEnabled;
    }

    function nav__set_cookie(name, value){
        document.cookie = name + '=' + value;
    }

    function nav__get_cookie(name){
        cookiestr = document.cookie;
        cookies = cookiestr.split('; ');
        for(var i = 0; i < cookies.length; i++){
            namevalue = String(cookies[i]).split('=');
            if(namevalue[0] == name){
                return namevalue[1];
            }
        }
        return null;
    }