error with setting a post variable in a query display

[DrHorrible]

<?php
           if(!isset($_SESSION['FactLimit'])) {
                      $_SESSION['FactLimit'] = 0;
           }
           echo "<table border='1'>";

       echo "<tr> <th>Name</th> <th>Cost</th> <th>Description</th> <th>Purchase </th> </tr>";     

       $result = mysql_query("SELECT * FROM `factories` LIMIT ".$_SESSION['FactLimit'].", 10 ") or die(mysql_error());
       while($row = mysql_fetch_array( $result )) {
           //Print out the contents of each row into a table
           echo "<tr><td>";
           echo $row['name'];
           echo "</td><td>";
           echo $row['cost'];
           echo "</td><td>";      
           echo $row['description'];
           echo "</td><td>";      
           echo "<form action=\"purchasefactory.php\" method=\"post\"> ";
           echo "<input type=\"hidden\" name=\"factoryid\" value=\"".$row['factoryid']."\"> ";
           echo "<input type=\"submit\" name=\"submit\" value=\"Purchase\">";
           echo "</td></tr>";  
       }

no matter how many rows it displays, nor which submit button you hit the next page displays $_POST['factoryid'] as the last row displayed's factoryid and not the row clickeds factoryid

[bpat1434]

You need to close the form inside the <td> element.