Where is the problem in this javascript/ajax script

[TeddyKiller]

I have a wall post thing, and.. well you comment on it, but.. when i submit a post, it brings down the 'loading comment' and it disappears - as it should do.

 

But the php script doesn't execute, it doesn't even add it to the database.. I cant think of where the problem is.

 

Ajax/javacript

$(function() {       
    //Update Message...
    $(".post").click(function() {
       var boxval = $("#message").val();

       if(boxval=='') {
           alert("Please Enter Some Text");
       } else {
           $("#flash").show();
           $("#flash").fadeIn(400).html('<span class="loading">Loading Comment...</span>');

           $.ajax({
               type: "POST",
               url: "update_wall.php",
               data: {upd: "2", content: boxval},
               cache: false,
               success: function(html){
                   $("div#update").prepend(html);
                   $("div#update").slideDown("slow");
                   document.getElementById('content').value='';
                   document.getElementById('content').focus();
                      $("#flash").hide();
               }
           });
       } 
       return false;
    });
});

 

PHP

<?php require_once("include/config.php"); 

if(!$session->logged_in) : redirect("/index.php"); endif;

if($_POST['upd'] == '1')
{
    if(isset($_POST['content']))
    {
        $content = clean($_POST['content'],1,0,0);
    
        $time = time();

        $query = $db->execute("INSERT INTO horblewall (user_id, comment, posted) VALUES ('$user->id', '$content', '$time')");
    
        $query = $db->execute("SELECT w.*, u.avatar, u.displayname FROM horblewall as w, users as u WHERE u.id = w.user_id ORDER BY w.posted DESC");

        $row = $db->fetchassoc($query);
      
        echo '<div style="border-bottom:1px solid #e11919;" class="bar'.$row['id'].'">
                
            <div style="text-align:left; min-height:90px;">
                    
                <div style="float:right; width:105px;">
                    Posted on<br />'.date("d.m.y H:i", $row['posted']).'
                    <br /><br />
                    Msg no. '.$row['id'].'
                    <br />';
            
                    if($user->level == '9')
                    {
                        echo '<br />
                        <span class="delete_button"><a href="#" id="'.$row['id'].'" class="delete_update">Delete</a></span>';
                    }
                    else if($row['user_id'] == $user->id)
                    {
                        echo '<br />
                        <span class="delete_button"><a href="#" id="'.$row['id'].'" class="delete_update">Delete</a></span>';
                    }
                        
                echo '</div>
                            
                <div style="float:left; width:80px; text-align:center;">
                    <img src="resize_image.php?file='.$row['avatar'].'&size=70" />
                    <br />
                    <a href="#">'.$row['displayname'].'</a>
                </div>
            
                <div style="margin-right:120px; margin-left:95px;"><p>'.$row['comment'].'</p></div>
                        
            </div>
        </div>';
    } else {
        echo 'Message empty';
    }
}
?>

 

Wheres the problem? I've removed the redirection from the php, and.. well, same thing happens =[

[JasonLewis]

Tried running it with Firebug, checking the console to see if the Ajax call is running correctly?