sorting by letter

[flemingmike]

hello, i have the following, which is sorting by id number with a horizontal line between.  im trying to make it so that it is sorted by supplier with lines between each letter.

 

 

<?phpif ($PreviousID!=0 && $ManID != $PreviousID) {?>                           <hr />                           <?PHP }                           $PreviousID = $ManID;					  include 'config.php';include 'javascript.php';@mysql_select_db ("citycore", $conn) OR DIE (mysql_error());$sql = "SELECT * FROM supplier ORDER BY supplier";$result = @mysql_query($sql, $conn) or die(mysql_error());//$row2 = mysql_query($sql, $conn);$PreviousID=0;while ($row = mysql_fetch_array($result)) {  $ManID = $row['id'];  $id=$row['id'];  $supplier=$row['supplier'];  $address=$row['address'];  $city=$row['city'];  $province=$row['province'];  $postal=$row['postal'];  $phone2=$row['phone2'];  $phone=$row['phone'];  $fax=$row['fax'];  $email=$row['email'];    	?>	<div align="center">                              <table border="1" width="95%" style="border-collapse: collapse">                                <tr>                                  <td><?php echo $row['supplier'];?></td>                                  <td><a href="http://mapof.it/<?php echo($address .' ' .$city .',' .' ' .$province .' ' .$postal); ?>" target="_blank"><?php echo($address .' ' .$city .',' .' ' .$province .' ' .$postal); ?></a></td>                                </tr>                              </table>                              </div><?PHP  } ?>