function request not working help for newbie pleaseeee

Hi I have a table that shows a list of results and a script that runs when the complete button is pressed on a result ( it allows to enter a name before confirming the result)

It al works great when clicking the button on the first result in the table but wont work for any other result?

Hope someone can help

         
             <script>
               function requestRepairedBy()
               {
                  var repaired_by = prompt('Name of repairer');
                  if (repaired_by != null && repaired_by != "")
                  {
                      document.getElementById('repaired_by').value = repaired_by;
                  }
                  else
                  {
                      alert("Invalid repairer name");
                      return false;
                  }
               }         
             </script>

<form method="post" action="warehouse_summary.php?warehouse_id=<?php echo $warehouse_id; ?>&report_id=<?php echo $db_report_id;?>" 
            onsubmit="return requestRepairedBy()"
            />
            
              <input type="hidden" name="repaired_by" id="repaired_by" />
					  <tr>
						<td><a href="entrydisplay.php?report_id=<?php echo $db_report_id; ?>"><?php echo $db_dam_location; ?></a></td>
						<td><?php if($damage_level1 == 0){ echo ''; } else { echo $damage_level1; } ?></td>
						<td><?php if($damage_level2 == 0){ echo ''; } else { echo $damage_level2; } ?></td>
						<td><?php if($damage_level3 == 0){ echo ''; } else { echo $damage_level3; } ?></td>
						<td><?php if($damage_level5 == 0){ echo ''; } else { echo $damage_level5; } ?></td>
						<td><?php if($damage_level6 == 0){ echo ''; } else { echo $damage_level6; } ?></td>
						<td><?php if($damage_level7 == 0){ echo ''; } else { echo $damage_level7; } ?></td>
						<td><?php if($damage_level9 == 0){ echo ''; } else { echo $damage_level9; } ?></td>
						<td><?php if($damage_level10 == 0){ echo ''; } else { echo $damage_level10; } ?></td>
						<td><?php if($damage_level12 == 0){ echo ''; } else { echo $damage_level12; } ?></td>
						<td><?php if($damage_level11 == 0){ echo ''; } else { echo $damage_level11; } ?></td>
						<td><?php if($damage_level14 == 0){ echo ''; } else { echo $damage_level14; } ?></td>
						<td><?php if($damage_level13 == 0){ echo ''; } else { echo $damage_level13; } ?></td>
						<td><?php if($damage_level15 == 0){ echo ''; } else { echo $damage_level15; } ?></td>
						<td><?php if($damage_level16 == 0){ echo ''; } else { echo $damage_level16; } ?></td>
						<td><?php echo $db_damage_comment; ?></td>
						<td><?php echo $db_components; ?></td>
						<td><?php echo $locationEmpty; ?></td>
						<td><?php echo $db_no_positions; ?></td>

						<td><input type="submit" value="Complete" class="submitbutton" name="save" /></td>
					  </tr>
					  </form>

Because you have multiple forms with the same ID. Which isn't valid because IDs are supposed to be unique.

Also, FORMs are not valid directly inside TABLE tags.