html - Get <tr> value from id with jquery -

<table cellpadding="0" cellspacing="0" border="0" class="display" id="example" >     <thead>          <tr>              <th>project code</th>              <th>project name</th>              <th>project ref id</th>              <th>effective date</th>              <th>close date</th>              <th>last update date</th>             <th>creation date</th>             <th>created by</th>             <th>last update by</th>             <th>action</th>         </tr>      </thead>      <tbody>           <?php          //error_log(print_r($project,false));          for($i=0;$i<count($project);$i++)         { ?>             <tr class="project_id"  value="<?php echo $project[$i]   ['project_id']; ?>">              <td><?php echo $project[$i]['project_code']; ?></td>                 <td><?php echo $project[$i]['project_name']; ?></td>                 <td><?php echo $project[$i]['project_ref_id']; ?></td>                 <td><?php echo $project[$i]['effective_date']; ?></td>                 <td><?php echo $project[$i]['close_date']; ?></td>                 <td><?php echo $project[$i]['last_update_date']; ?></td>                 <td><?php echo $project[$i]['creation_date']; ?></td>                 <td><?php echo $project[$i]['created_by']; ?></td>                 <td><?php echo $project[$i]['last_update_by']; ?></td>                 <td><img class="edit" >src="http://spsvn01/raidlog/application/assets/img/file_edit.png" alt="edit" >border=1 height=20 width=20>                       <img class="delete" >src="http://spsvn01/raidlog/application/assets/img/notification_error.png" >alt="delete" border=1 height=20 width=20>                 </td>              </tr>         <?php } ?>          </tbody>  </table>  <script type="text/javascript"> $(document).ready(function() {    var table=  $('#example').datatable(                 {                 "columndefs": [                     { "width": "10%", "targets": 0 }]                 });       $('.delete').click(function () {         var project_id = $('.project_id').val();         alert(project_id);   });             } ); </script> 

please want tr value , don't know how do..

$('.delete').click(function() { var project_id = $(this).closest('tr').attr('.value');    alert(project_id); }); .attr('value'); not .attr('.value'); 

this work fine.