jQuery.ajax({
            url : 'includes/login.inc.php',
            type : 'POST',
            data : 'username=' + $('#user_name').val() + '&password=' + $('#password').val(),
            success : function(response){
                if(response == 1){
                    $("#login_form").fadeOut("normal");
                    $("#msgbox").fadeTo(200,0.1,function(){
                        $(this).html('Bezig met inloggen...').addClass('messageboxok').fadeTo(900,1,
                        function(){
                            window.setTimeout(document.location='logged_in.php', 1000);
                        });
                    });
                }else{
                    $("#msgbox").fadeTo(200,0.1,function(){
                        $(this).html('Gebruikersnaam of wachtwoord onjuist...').addClass('messageboxerror').fadeTo(900,1);
                    });
                }
            }
        });