javascript - Searching a table row for specific text in a COLUMN and HIGHLIGHT -

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i retrieve information database , create table. have column name status , of values equal 'a'. there values though equal 'c'. want rows column of status equal 'c' background color red.

my code doesn't seem work , think javascript part.

any welcome.

my code this: 

<thead>     <tr>         <th>dongle</th>         <th>actdate</th>         <th>moddate</th>         <th>client</th>         <th>company</th>         <th>activation</th>         <th>comments</th>         <th>status</th>    </tr>  </thead>  <script type="text/javascript">  $(document).ready(function(){     $('table tr').each(function(){        if($(this).find('td').eq(3).text() == 'c'){           $(this).css('background','red');        }     }); });  </script>  <?php  $querystring = $_session['clientid'];  $server = "212.50.99.130\sqlexpress"; $user = "sa"; $password = "sql";  $database = "licenses"; $connectioninfo = array( "database"=>$database,"uid"=>$user, "pwd"=>$password); $link = sqlsrv_connect($server, $connectioninfo);  if ($link === false) {     echo "connection failed. \n";     die(print_r(sqlsrv_errors(), true)); }                                     $reseller = $_session["seller"];  $strsqlsel= "select dongle dongle, actdate actdate,               moddate    moddate, client client, company company,               activation activation,              comments comments, status status              licenses              reseller = '$reseller'               group dongle,actdate,moddate,client,company,activation,comments,status";  $result = sqlsrv_query($link,$strsqlsel); while ($row = sqlsrv_fetch_array($result,sqlsrv_fetch_assoc)){  ?>  <tbody>     <tr>       <td><p><?php echo $row['dongle']; ?></p></td>       <td><p><?php echo date_format($row['actdate'],'y-m-d'); ?></p></td>       <td><p><?php echo date_format($row['moddate'],'y-m-d'); ?></p></td>       <td><p><?php echo $row['client']; ?></p></td>       <td><p><?php echo $row['company']; ?></p></td>       <td><p><?php echo $row['activation']; ?></p></td>       <td><p><?php echo $row['comments']; ?></p></td>       <td><p><?php echo $row['status']; ?></p></td>     </tr>  <?php     }    ?>  </tbody> </table>

css:

tr.red-status {background-color: red;}

php template, table tbody:

<tbody>     <?php     $result = sqlsrv_query($link, $strsqlsel);     while ($row = sqlsrv_fetch_array($result, sqlsrv_fetch_assoc)) :     ?>         <tr class="<?php echo ($row['status'] == 'c') ? 'red-status' : '' ?>">             <td><p><?php echo $row['dongle']; ?></p></td>             <td><p><?php echo date_format($row['actdate'],'y-m-d'); ?></p></td>             <td><p><?php echo date_format($row['moddate'],'y-m-d'); ?></p></td>             <td><p><?php echo $row['client']; ?></p></td>             <td><p><?php echo $row['company']; ?></p></td>             <td><p><?php echo $row['activation']; ?></p></td>             <td><p><?php echo $row['comments']; ?></p></td>             <td><p><?php echo $row['status']; ?></p></td>         </tr>     <?php endwhile; ?> </tbody>

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