ต้องการให้สินค้าที่คงเหลือ 0 ไม่สามารถเลือกได้ และเเจ้งเตือนเมื่อกดเลือกอะครับ

<div class="col-lg-12">
                    <div class="panel panel-default">
                        <div class="panel-heading">
                           Description.
                        </div>
                        <!-- /.panel-heading -->
                        <div class="panel-body">
                            <div class="table-responsive">
                                <table class="table table-striped table-bordered table-hover" id="dataTables-example">
                                    <thead>
                                        <tr>

                                            <th width='80'>StockNo.</th>
                                            <th width='90'>Account</th>
                                            <th width='90'>Detail</th>   
											<th width='70'>Receive</th>
											<th width='60'>Use</th>
											<th width='60'>Total</th>

											
                                        </tr>
                                    </thead>
                                    <tbody>
						<?
						$sql="SELECT * FROM stockbalance  where list not in (select request.desc from request where g='$g') and type in ($type);;";
						
						$result = mysql_query($sql);
						//echo mysql_error();
							while($row = mysql_fetch_array($result)){
										
										$id=$row['id'];
										$account=$row['account'];
										$list=$row['list'];		
										$sum_receive=$row['sum_receive'];
										$sum_use=$row['sum_use'];
										$total=$row['total'];
				
                                      echo "<tr class='odd gradeX'>";
								
									  echo "<td>".$id."</td>";
                                      echo "<td>".$account."</td>";
                                      echo "<td><a href='#' onclick="window.opener.document.form2.desc.value='$list';window.close();">".$list."</a></td>";
									  echo "<td>".$sum_receive."</td>";
									  echo "<td>".$sum_use."</td>";
									  echo "<td>".$total."</td>";
									
									  
									  
                                      echo "</tr>
";
											}
                       ?>
                                     
										
										
										</tbody>
								</table>
								
                            </div>
                            <!-- /.table-responsive -->
   							
                        </div>
						

                        <!-- /.panel-body -->
                    </div>
                    <!-- /.panel -->
                </div>

	  echo "<td>".$id."</td>";  
	  echo "<td>".$account."</td>";  
	  if($xxxxx>0){
	  	echo "<td><a href='#' onclick='window.opener.document.form2.desc.value='".$list."';window.close();'>".$list."</a></td>";  
	  }else{
	  	echo "<td><a href='#' onclick='alert('xxxxx')'>".$list."</a></td>";  		  
	  }
	  echo "<td>".$sum_receive."</td>";  
	  echo "<td>".$sum_use."</td>";  
	  echo "<td>".$total."</td>";