Lau_1 12 Junior Poster in Training

I have no idea how to open extra chat box if room_id record more than 1

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Admin</title>

<script type="text/javascript" src="js/jquery-1.9.0.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {

    // load messages every 1000 milliseconds from server. (1 second = 1000milliseconds)
    var roomID = $('#room_id').val();
    load_data = {'fetch':1,'roomID':roomID};
    window.setInterval(function(){
     $.post('shoutAdmin.php', load_data,  function(data) {
        $('.message_box').html(data);
        //var scrolltoh = $('.message_box')[0].scrollHeight;
        //$('.message_box').scrollTop(scrolltoh);
     });
    }, 1000);

    //method to trigger when user hits enter key
    $("#shout_message").keypress(function(evt) {
        if(evt.which == 13) {
                var iusername = $('#shout_username').val();
                var imessage = $('#shout_message').val();
                var roomID = $('#room_id').val();
                post_data = {'username':iusername, 'message':imessage, 'roomID':roomID};

                //send data to "shout.php" using jQuery $.post()
                $.post('shoutAdmin.php', post_data, function(data) {

                    //append data into messagebox with jQuery fade effect!
                    $(data).hide().appendTo('.message_box').fadeIn();

                    //keep scrolled to bottom of chat!
                    var scrolltoh = $('.message_box')[0].scrollHeight;
                    $('.message_box').scrollTop(scrolltoh);

                    //reset value of message box
                    $('#shout_message').val('');

                }).fail(function(err) { 

                //alert HTTP server error
                alert(err.statusText); 
                });
            }
    });

    //toggle hide/show shout box
    $(".close_btn").click(function (e) {
        //get CSS display state of .toggle_chat element
        var toggleState = $('.toggle_chat').css('display');

        //toggle show/hide chat box
        $('.toggle_chat').slideToggle();

        //use toggleState var to change close/open icon image
        if(toggleState == 'block')
        {
            $(".header div").attr('class', 'open_btn');
        }else{
            $(".header div").attr('class', 'close_btn');
        }


    });
});

</script>
</head>

<body>
<div class="shout_box">
<div class="header">Live Customer Service <div class="close_btn">&nbsp;</div></div>
  <div class="toggle_chat">
  <div class="message_box">
    </div>
    <div class="user_info">
    <input name="shout_username" id="shout_username" type="hidden" placeholder="Your Name" maxlength="15" value="admin"/>
    <input name="room_id" id="room_id" type="hidden" placeholder="Your Name" maxlength="15" value="roomID20"/>
   <input name="shout_message" id="shout_message" type="text" placeholder="Type Message Hit Enter" maxlength="100" /> 
    </div>

    </div>
</div>

shout.php

<?php

if($_POST)
{

    if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {
        die();
    } 

    if(isset($_POST["message"]) &&  strlen($_POST["message"])>0)
    {
        $username = filter_var(trim($_POST["username"]),FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH);
        $message = filter_var(trim($_POST["message"]),FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH);
        $room_id = filter_var(trim($_POST["roomID"]),FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH);
        $user_ip = $_SERVER['REMOTE_ADDR'];


        //insert new message in db
        if(mysqli_query($sql_con,"INSERT INTO shout_box(user, message, ip_address, room_id) value('$username','$message','$user_ip','$room_id')"))
        {
            $msg_time = date('h:i A M d',time()); // current time
            echo '<div class="shout_msg"><time>'.$msg_time.'</time><span class="username">'.$username.'</span><span class="message">'.$message.'</span></div>';
        }

        // delete all records except last 10, if you don't want to grow your db size!
        mysqli_query($sql_con,"DELETE FROM shout_box WHERE id NOT IN (SELECT * FROM (SELECT id FROM shout_box ORDER BY id DESC LIMIT 0, 10) as sb)");
    }

    elseif($_POST["fetch"]==1)
    {
        $room_id = $_POST["roomID"];
        $results = mysqli_query($sql_con,"SELECT user, message, date_time FROM (select * from shout_box ORDER BY id DESC LIMIT 10) shout_box ORDER BY shout_box.id ASC");
        while($row = mysqli_fetch_array($results))
        {
            $msg_time = date('h:i A M d',strtotime($row["date_time"])); //message posted time
            echo '<div class="shout_msg"><time>'.$msg_time.'</time><span class="username">'.$row["user"].'</span> <span class="message">'.$row["message"].'</span></div>';
        }
    }
    else
    {
        header('HTTP/1.1 500 Are you kiddin me?');
        exit();
    }
}



</body>
</html>

I try to do by mysql, which select only user comments,(excluded admin).
Assume the record for $testing = 2, it will keep loop the chat box. Since it will update every second.

        $testing = mysqli_query($sql_con, "SELECT count(DISTINCT room_id) as total FROM shout_box where room_id != 'roomID20'");

Any idea?