<link href="https://cdn.datatables.net/1.13.2/css/jquery.dataTables.css" rel="stylesheet" type="text/css" />

<script src="https://cdn.datatables.net/1.13.2/js/jquery.dataTables.js"></script><script src="https://code.jquery.com/jquery-1.12.4.min.js"></script><script src="https://code.jquery.com/jquery-3.1.0.min.js"></script>

<input type="text" id="search" onkeyup="demin(this)"/>

<table class="date">

  <thead>

    <tr><th>TEST</th><th>BLAH</th></tr>

  </thead>

  <tbody>

    <tr>

      <td>abc</td>

      <td>xyz</td>

     </tr>

    <tr>

      <td>123</td>

      <td>xya</td>

    </tr>

  </tbody>

</table>

​

<table class="date">

  <thead>

    <tr><th>TEST</th><th>BLAH</th></tr>

  </thead>

  <tbody>

    <tr>

      <td>def</td>

      <td>xxx</td>

     </tr>

    <tr>

      <td>321</td>

      <td>yya</td>

     <tr>

      <td>123</td>

      <td>xya</td>

    </tr>

    </tr>

  </tbody>

</table>

<table class="date">

  <thead>

    <tr><th>TEST</th><th>BLAH</th></tr>

  </thead>

  <tbody>

    <tr>

      <td>abc</td>

      <td>xyz</td>

     </tr>

    <tr>

      <td>123</td>

      <td>xya</td>

    </tr>

  </tbody>

</table>