$(document).ready(
    function(){
        $('#language_current').toggle(
            function(){
                $('#language_current').removeClass('language_closed').addClass('language_opened');
                $('#languages_list').show();
                $('#language_current').css({"border-bottom-width" : "0"});
            }, 
            function(){
                $('#language_current').removeClass('language_opened').addClass('language_closed');
                $('#languages_list').hide();
                $('#language_current').css({"border-bottom-width" : "1px"});
            }
        );
    }
);