Помагите с скриптом CRUD

[karen12]

Есть вот такой CRUD скрипт, который отправляет в базу данные из одного <textarea>, мне нужен добавить еще одно поле <input>, но как не стараюсь сделать своими руками все идет к праху. Пожалуйста помагите реолизовать.
index.php

<style>
body{width:40%;}
.message-box{margin-bottom:20px;border-top:#F0F0F0 2px solid;background:#FAF8F8;padding:10px;}
.btnEditAction{background-color:#2FC332;border:0;padding:2px 10px;color:#FFF;}
.btnDeleteAction{background-color:#D60202;border:0;padding:2px 10px;color:#FFF;margin-bottom:15px;}
#btnAddAction{background-color:#09F;border:0;padding:5px 10px;color:#FFF;}
</style>
<?php
require_once("dbcontroller.php");
$db_handle = new DBController();
$comments = $db_handle->runQuery("SELECT * FROM comment");
?>
<script src="https://code.jquery.com/jquery-2.1.1.min.js" type="text/javascript"></script>
<script>
function showEditBox(editobj,id) {
    $('#frmAdd').hide();
    $(editobj).prop('disabled','true');
    var currentMessage = $("#message_" + id + " .message-content").html();
    var editMarkUp = '<textarea rows="5" cols="80" id="txtmessage_'+id+'">'+currentMessage+'</textarea><button name="ok" onClick="callCrudAction(\'edit\','+id+')">Save</button><button name="cancel" onClick="cancelEdit(\''+currentMessage+'\','+id+')">Cancel</button>';
    $("#message_" + id + " .message-content").html(editMarkUp);
}
function cancelEdit(message,id) {
    $("#message_" + id + " .message-content").html(message);
    $('#frmAdd').show();
}
function callCrudAction(action,id) {
    $("#loaderIcon").show();
    var queryString;
    switch(action) {
        case "add":
            queryString = 'action='+action+'&txtmessage='+ $("#txtmessage").val();
        break;
        case "edit":
            queryString = 'action='+action+'&message_id='+ id + '&txtmessage='+ $("#txtmessage_"+id).val();
        break;
        case "delete":
            queryString = 'action='+action+'&message_id='+ id;
        break;
    } 
    jQuery.ajax({
    url: "crud_action.php",
    data:queryString,
    type: "POST",
    success:function(data){
        switch(action) {
            case "add":
                $("#comment-list-box").append(data);
            break;
            case "edit":
                $("#message_" + id + " .message-content").html(data);
                $('#frmAdd').show();
                $("#message_"+id+" .btnEditAction").prop('disabled','');
            break;
            case "delete":
                $('#message_'+id).fadeOut();
            break;
        }
        $("#txtmessage").val('');
        $("#loaderIcon").hide();
    },
    error:function (){}
    });
}
</script>

<div class="form_style">
<div id="comment-list-box">
<?php
if(!empty($comments)) {
foreach($comments as $k=>$v) {
?>
<div class="message-box" id="message_<?php echo $comments[$k]["id"];?>">
<div>
<button class="btnEditAction" name="edit" onClick="showEditBox(this,<?php echo $comments[$k]["id"]; ?>)">Edit</button>
<button class="btnDeleteAction" name="delete" onClick="callCrudAction('delete',<?php echo $comments[$k]["id"]; ?>)">Delete</button>
</div>
<div class="message-content"><?php echo $comments[$k]["message"]; ?></div>
</div>
<?php
}
} ?>
</div>

<div id="frmAdd"><textarea name="txtmessage" id="txtmessage" cols="80" rows="5"></textarea>
<p><button id="btnAddAction" name="submit" onClick="callCrudAction('add','')">Add</button></p>
</div>
<img src="LoaderIcon.gif" id="loaderIcon" style="display:none" />
</div>

crud_action.php

<?php
require_once("dbcontroller.php");
$db_handle = new DBController();

$action = $_POST["action"];
if(!empty($action)) {
    switch($action) {
        case "add":
            $result = mysql_query("INSERT INTO comment(message) VALUES('".$_POST["txtmessage"]."')");
            if($result){
                  $insert_id = mysql_insert_id();
                  echo '<div class="message-box"  id="message_' . $insert_id . '">
                        <div>
                        <button class="btnEditAction" name="edit" onClick="showEditBox(this,' . $insert_id . ')">Edit</button>
<button class="btnDeleteAction" name="delete" onClick="callCrudAction(\'delete\',' . $insert_id . ')">Delete</button>
                        </div>
                        <div class="message-content">' . $_POST["txtmessage"] . '</div></div>';
            }
            break;
        
        case "edit":
            $result = mysql_query("UPDATE comment set message = '".$_POST["txtmessage"]."' WHERE  id=".$_POST["message_id"]);
            if($result){
                  echo $_POST["txtmessage"];
            }
            break;        
    
        case "delete":
            if(!empty($_POST["message_id"])) {
                mysql_query("DELETE FROM comment WHERE id=".$_POST["message_id"]);
            }
            break;
    }
}
?>