<script type='text/javascript'>
function submitForm()
{
    var xhr;
    try { xhr = new XMLHttpRequest();
}                
    catch(e)
    {    
      xhr = new ActiveXObject(Microsoft.XMLHTTP);
    }

xhr.onreadystatechange =function()
{
if(xhr.readyState == 4)
{
if(xhr.status == 200)

document.getElementById('c').innerHTML="SENT";
else
document.ajax.dyn.value="ERROR CODE" + xhr.status;
}
};
var data=document.ajax.dyn.value;
//var chat=document.ajax.ba.value;
var final="&content="+data;
xhr.open("GET","chat2.php?ba=<?php echo $_GET[a];?>" +final,true);
xhr.send(data);
}




</script>

<?php
require('connection2.php');
require('sessions.php');
require('details.php');
$sel=mysql_query("SELECT * FROM `chat` ORDER BY `id` LIMIT 1,6 ");
echo "<table border='1'> <tr><th colspan=2>SIDECHAT</th></tr><tr><td colspan=2>";
while($row=mysql_fetch_array($sel)) {
echo "<font color='yellow'><b>".$row['name']."</b></font>:<font color='gray'>".$row['content']."</font><br />";
}
echo "</td></tr><br /><tr><td colspan=2> <div id='c'> </div></tr></td></tr>";
echo "<tr><td colspan=1><FORM method='POST' name='ajax' action=''><INPUT type='text' name='dyn' maxlength='40'></td><td><input type='submit' onClick='submitForm()' value='>' ></td></tr>";

require('links.php');
?>

ORDER BY `id` DESC

SELECT RecordId
FROM Table
WHERE RecordId
IN (
SELECT RecordId
FROM Table
ORDER BY RecordId DESC
LIMIT 100
)
ORDER BY RecordId ASC

function Ajax*() {
...
..

setTimeOut('Ajax*();', 2000 );
}