rerun code from a image hyperlink

[Darkmatter5]

Here's my code

 

function show_filing() {
  include 'library/config.inc.php';
  $conn=mysql_connect($dbhost, $dbuser, $dbpass) or die('Error connecting to mysql');
  mysql_select_db($dbnamemain);
            
  //$query=mysql_query("SELECT cab_name, fol_name, items.*
  //                    FROM items
  //                    JOIN folders ON(items.folder_id=folders.folder_id)
  //                    JOIN cabinets ON(cabinets.cabinet_id=folders.cabinet_id)
  //                    ORDER BY cabinets.cab_name DSC, folders.fol_name DSC
  //                    ") or die(mysql_error());
  $query=mysql_query("SELECT cab_name, fol_name, items.*
    FROM items
    JOIN folders ON(items.folder_id=folders.folder_id)
    JOIN cabinets ON(cabinets.cabinet_id=folders.cabinet_id)
    ORDER BY cabinets.cab_name ASC, folders.fol_name ASC
    ") or die(mysql_error());
  echo "<p>
    <table width='100%' border='0' cellspacing='1' cellpadding='3'>
    <th width='200'>PATH<img src='images/up.gif'><img src='images/down.gif'></th>
    <th width='200'>NAME<img src='images/up.gif'><img src='images/down.gif'></th>
    <th>DESCRIPTION</th>
    <th width='70'>ACTION</th>";
            
  $filltog=0;
  while($row=mysql_fetch_array($query)) {
    if($filltog==0) { $fillcolor="#A8231C"; }
    else { $fillcolor="#686615"; }
      echo "<tr bgcolor='$fillcolor'>
        <td>$row[cab_name] -> $row[fol_name] -> </td>
        <td>" .substr($row['item_name'],0,100). "</td>
        <td>$row[item_description]</td>
        <td align='center'>Delete | Edit</td>
        </tr>";
    if($filltog==0) { $filltog=1; }
    else { $filltog=0; }
  }
  echo "</table>";
            
  mysql_close($conn);
}

 

This code is run from another page by this line. "<?php $ec->show_filing(); ?>"

As you can see I have a descending and ascending version of the same query. I want the user to be able to click the up or down arrow gifs to resort and display the query result depending on what gif they click.  Obviously up arrow meaning ascending and down arrow meaning descending.  How can I make the script rerun depending on the arrow clicked?