I try to do a smart refresh to my chat room; however, i can't get it work
My chat room is similar to shoutbox.

I try to use the reference from this page to do the smart refresh.
http://codewalkers.com/tutorials/87/2.html

One of my biggest problem is that i don't know java script, i only can come up stuffs with php, so if there anyone can subtitute the php, that will be good.


here is my script input message script
PHP Code:
<?
error_reporting
(E_ALL); 
session_start();
header("Cache-control: private");

if (!isset(
$_SESSION['user_login']) || $_SESSION['user_login'] !== true) {
   
header('Location: auth.php?action=login');
   exit;
}


//make register_globals off
if (ini_get('register_globals')) {
    
$superglobals = array($_SERVER$_ENV,
        
$_FILES$_COOKIE$_POST$_GET);
    if (isset(
$_SESSION)) {
        
array_unshift($superglobals$_SESSION);
    }
    foreach (
$superglobals as $superglobal) {
        foreach (
$superglobal as $global => $value) {
            unset(
$GLOBALS[$global]);
        }
    }
    
ini_set('register_globals'false);
}
//make register_globals off


?>
<?php


$users 
$_SESSION['username'];
$user_id $_SESSION['user_id'];
?>

<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<form method="post" action="message.php">
<input type="hidden" NAME="username" value="<? echo "$users"?>">
Message: <input type="text" NAME="message" value="" size="60"> 
<input type="submit" name="submit" value="submit"> <a href="auth.php?action=logout&user_id=<? echo $user_id?>" target="_parent">Logout</a>
</form>
</html>

Here is my message windows script
PHP Code:
<?
session_start
();
if (!isset(
$_SESSION['user_login']) || $_SESSION['user_login'] !== true) {
   
header('Location: auth.php?action=login');
   exit;
}

//make register_globals off
if (ini_get('register_globals')) {
    
$superglobals = array($_SERVER$_ENV,
        
$_FILES$_COOKIE$_POST$_GET);
    if (isset(
$_SESSION)) {
        
array_unshift($superglobals$_SESSION);
    }
    foreach (
$superglobals as $superglobal) {
        foreach (
$superglobal as $global => $value) {
            unset(
$GLOBALS[$global]);
        }
    }
    
ini_set('register_globals'false);
}
//make register_globals off

include ('connect.php');
$conn = include ('connect.php');
echo 
'<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">'
;






if (
$_SERVER['REQUEST_METHOD'] == 'POST')
{

include (
'connect.php');
$username mysql_real_escape_string($_POST['username']);
$message mysql_real_escape_string($_POST['message']);



if (empty(
$_POST['message']))
{
echo 
"You did not enter any message<br \>";
exit;
}

$query "INSERT INTO chatroom (username, message, msgdate) VALUES ('$username', '$message', NOW())";
$result mysql_query($query) or die('Error in artist query: ' mysql_error());
@
mysql_query ($result$conn);

        
$mytime time();
        
touch ('sar.pid'$mytime);
        
setcookie ('pid'$mytimetime()+(60*60));
        
$redir dirname('http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'])
               . 
'/input.php';
        
Header ('Location:'.$redir);
        exit();

}





//bad word function
function badword($message


$fp fopen("badwords.txt""r"); 
while(
$line fgets($fp)) { 
   list(
$bad,$good) = explode("|"$line); 
   
$badwords[$bad] = $good

$filter = array($bad => $good);


foreach (
$filter as $bad => $good)  
{



$message str_replace("$bad""$good"$message); 


}

return 
$message

//bad word function
?>


<script language='JavaScript1.2'>
<!--
function sar(mytime)
{
    img = new Image;
    img.src = 'detector.php';
    pid = read_cookie('pid');
    if (pid > mytime)
    {
        var mytime = pid;
        write_cookie ('mytime', mytime, 1);
        document.location.href = 'message.php';
    }
    setTimeout('sar('+ mytime +')', 2000);
}
function read_cookie (name)
{
    var cookieValue = "";
    var search = name + "=";
    if(document.cookie.length > 0)
    {
        offset = document.cookie.indexOf(search);
        if (offset != -1)
        {
            offset += search.length;
            end = document.cookie.indexOf(";", offset);
            if (end == -1) end = document.cookie.length;
            cookieValue = unescape(document.cookie.substring(offset, end))
        }
    }
    return cookieValue;
}
function write_cookie(name, value, hours)
{
    var expire = "";
    if(hours != null)
    {
        expire = new Date((new Date()).getTime() + hours * 3600000);
        expire = "; expires=" + expire.toGMTString();
    }
    document.cookie = name + "=" + escape(value) + expire;
}
function start(mytime)
{
    write_cookie ('mytime', mytime, 1);
    sar (mytime);
}
start (<?=time();?>);
-->
</script>




<?
$query 
"SELECT * FROM chatroom ORDER BY msgdate DESC LIMIT 0,30";
$result mysql_query($query);
if (
mysql_num_rows($result) >= 1)
{


while(
$row mysql_fetch_array($resultMYSQL_ASSOC))
{
$message $row['message'];
$username $row['username'];

echo 
"[" $username "]"badword($message), "<br>";
}

}

?>