function openD(id, last) {
            currentId = id;
            lastMessage = last;
            nameInterlocutor = $("#n" + id).html();
            photoInterlocutor = $("#av" + id).attr("src");
            $.post("/openD", {id: id}, dialog);
            timer = setInterval(function() {
                if(!bysy) {
                    getMessage();
                }
            }, 3000);
        }
            function getMessage() {
            $.post("/getMessage", {userId: currentId, messageId: lastMessage}, displayMessage);
        }

        function displayMessage(data) {
            bysy = true;
            var a = JSON.parse(data);
            if(data.length > 0) {
                var chat = $("#chat");
                $.each(a, function() {
                    alert(this.text);
                    $("#chat").append('<div class="message me">' +
                    '<img src="' + photoInterlocutor + '" />' +
                    '<div><p><strong>' + nameInterlocutor + ' : </strong>' + this.text + '<br/>' + messageDate.toLocaleDateString("ru", {
                        hour : "numeric",
                        minute : "numeric"
                    }) + '</p></div>' +
                    '</div>');
                    lastMessage = this.id;
                });
            };
            bysy = false;
        }