I am a self taught php programmer trying to make a blogging site using php and Ajax How do I paginate individual tab? I am using this code:

<?php
//  database connection
require_once('./includes/base.php');

if($_GET['logout'] == 1){
    @$_SESSION = array();
    @session_unregister($_SESSION['userID']);
    @session_unregister($_SESSION['userName']);
    @session_unregister($_SESSION['userUser']);
    @session_unregister($_SESSION['userPass']);
    @session_destroy();
}

require("./templates/$template/header.php");
include 'pagination.class.php';

?>

<div id="blurb"  align="right">

<script language="javascript">
    function isClear()
        {
            document.myForm[0].value='';
            return true;
       
        }
    </script>
    <!-- new search -->
    <?php
ob_start();
if(!empty($_SESSION['userID']) and !empty($_POST['user'])){
echo '<form action="search.php" method="post" name="myForm">
<input type="text" value="search here" id="search" size="20" name="search" onFocus="return isClear();"/>
<input type="submit" name="serachuser" value="search"/></form>';
}
?>
</div>
<br>
<div id="blurb" align="justify">
Hello world <?php echo "$sitename"; ?> is blah, blah, blah.......!
</div>
<br>

 <div id="container-5">
            <ul>
                <li><a href="#fragment-13"><span>Blogs</span></a></li>
                <li><a href="#fragment-14"><span>Links</span></a></li>
                <li><a href="#fragment-15"><span>Images</span></a></li>

            </ul>
            <div id="fragment-13">
                <?php
   

$sql = mysql_query("SELECT users.userUser, posts.postID, posts.postPost, posts.postTime, posts.postComments, userAvatar  FROM users, posts WHERE users.userID = posts.postUserID ORDER BY posts.postTime DESC ");                
while($row = mysql_fetch_array($sql)){
    $abcd= $row['userName'];
    $abcd = str_replace (" ", "-", $abcd);
 $time = reltime($row['postTime']);

    echo '
    <div class="virtualpage">
     <table width="100%" >
      <td width="10%" ><a href="'.$site_url.'/'.$row['userUser'].'"><img src="'.$site_url.'/avatars/'.$row['userAvatar'].'"  width="48px" height="48px" /><td width="90% "bgcolor="#F8F8F8"  border=1" cellspacing="1" cellpadding="1" ><b>'.$row['postPost'].'</b><br>Posted by:&nbsp;'.$row['userUser'].',&nbsp;<a href="'.$site_url.'/blogs/'.$row['userUser'].'/'.$row['postID'].'">Comments</a>&nbsp;'.$row['postComments'].' ,&nbsp;Time elapsed:&nbsp; '.$time.'</a></td>
    </table><br>
   
    </div>';}

    ?>

<div id="gallerypaginate" class="paginationstyle">
<a href="#" rel="previous">Prev</a> <span class="flatview"></span> <a href="#" rel="next">Next</a>
</div>
<table align="center"><tr><td align="center">
<script type="text/javascript"  defer="defer">
var gallery=new virtualpaginate("virtualpage",10)
gallery.buildpagination("gallerypaginate")
</script>
</td></tr></table>

            </div>

</div>

            </div>

            <div id="fragment-14">
                <?php

                 $sql = mysql_query("SELECT users.userUser, links.linksID, links.linksLink, links.linksPost, links.linksTime, links.linksComments,userAvatar FROM users, links WHERE users.userID = links.linksUserID ORDER BY links.linksTime DESC");
while($row = mysql_fetch_array($sql)){
    $abcd= $row['userName'];
    $abcd = str_replace (" ", "-", $abcd);
 $time1 = reltime($row['linksTime']);

    echo '
    <div class="virtualpage">
     <table width="100%" >
      <td width="10%" ><a href="'.$site_url.'/'.$row['userUser'].'"><img src="'.$site_url.'/avatars/'.$row['userAvatar'].'"  width="48px" height="48px" /><td width="90% "bgcolor="#F8F8F8"  border=1" cellspacing="1" cellpadding="1" ><b>'.$row['linksPost'].'</b><br>Posted by:&nbsp;'.$row['userUser'].',&nbsp;<a href="'.$site_url.'/blogs/'.$row['userUser'].'/'.$row['linksID'].'">Comments</a>&nbsp;'.$row['linksComments'].' ,&nbsp;Time elapsed:&nbsp; '.$time1.'</a></td>
    </table><br>
   
    </div>';}

    ?>

            </div>
            <div id="fragment-15">
                <?php
                // testing
                grabimages('SELECT users.userUser, images.imagesID, images.imagesFile, images.imagesPost, images.imagesTime, images.imagesComments FROM users, images WHERE users.userID = images.imagesUserID ORDER BY images.imagesTime DESC LIMIT 20');

                ?>

            </div>
        </div>

<?php

// Display footer
require("./templates/$template/footer.php");
?>

The above virtual pagination shows up in every tab.

<asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Conditional" runat="server">
<ContentTemplate><div>
<tabctrl:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0" Width="1250px" ScrollBars="None"><tabctrl:TabPanel ID="TabPanelMap" runat="server" HeaderText="Map">
And here is the codebehind I am using:
AjaxControlToolkit.TabContainer container = (AjaxControlToolkit.TabContainer)TabContainer1;
container.ActiveTabIndex = 2;
I get the error that the 'TabContainer1' does not exist in this context.
Do you have any thoughts? Thank you.