function filter() {
 var check =document.getElementById('checkbox');
 var members = $('.member');
 var status = $('.memberStatus');
 if (check.checked) {
 members.each(function(i, member) {
 if (status[i].innerText == 'Offline') {
 member.style.display = 'none';
 }
 });
 } else {
  members.each(function(i, member) {
   member.style.display = '';
  });
 }
}

<input type="checkbox" name="onlineOnly" tabindex="0" id="checkbox" onclick="filter()">
<span>Show online users only</span>
<table>
 <tr class="member">
 <td>
  UserA
 </td>
 <td class="memberStatus">
  Online
 </td>
 </tr>
 <tr class="member">
 <td>
  UserB
 </td>
 <td class="memberStatus">
  Offline
 </td>
 </tr>
 <tr class="member">
 <td>
  UserC
 </td>
 <td class="memberStatus">
  Online
 </td>
 </tr>
</table>