Next 10 sider, (tagwall)

Hvordan laver jeg sådan at den autpmatisk laver en ny side efter 20 indlæg i min tagwall? :)
det er med mysql.

Kode:

<form name=submit action=opret-tagwall.php method=post>
    <table border=0 width=98% cellpadding=0 cellspacing=0>
      <tr>
      <td align=center>Dit navn:</td>
            </tr>
      <tr>
      <td align=center><input type=text name=overskrift size=30 maxlength=20></td>
      </tr>
      <tr>
      <td align=center>Din besked:</td>     
      </tr>
      <tr>
      <td align=center><textarea name=besked rows=6 cols=40></textarea></td>
      </tr>
      <tr>
      <td align=center colspan=2><br><input type=submit name=opret value='Opret besked'></td>
      </tr>
    </table>
</form>

<center><?php
  mysql_connect ("localhost", "hemmeligt", "hemmeligt");
  mysql_select_db ("hemmeligt");
  $data=mysql_query("SELECT * FROM tagwall ORDER BY ID DESC");
  while($output=mysql_fetch_row($data))
    {
    print "
<TABLE cellSpacing=0 cellPadding=0 width=300 align=center border=0>
        <TR>
          <TD style=BORDER-RIGHT: #777777 1px solid; BORDER-TOP: #777777 1px solid; BORDER-LEFT: #777777 1px solid; BORDER-BOTTOM: #777777 1px solid; TEXT-ALIGN: justify>skrevet af <b>$output[1]</b> den $output[4] - $output[5]</TD></TR>
        <TR>
          <TD style=BORDER-RIGHT: #777777 1px solid; BORDER-TOP: #777777 1px solid; BORDER-LEFT: #777777 1px solid; BORDER-BOTTOM: #777777 1px solid; TEXT-ALIGN: justify>
            <TABLE cellSpacing=0 cellPadding=0 width=300 align=center border=0>
              <TR>
                <TD style=BORDER-RIGHT: #777777 3px solid; BORDER-TOP: #777777 3px solid; BORDER-LEFT: #777777 1px solid; BORDER-BOTTOM: #777777 1px solid; TEXT-ALIGN: justify>$output[3]</TD>
              </TR></TABLE></TD></TR></TABLE><BR>
    ";
    }
?>