Much closest()

Much closest()

If i have this:
 
  1. <tr id=ok>
      <td> <button id=trigger> Button </button> </td>  
    </tr>

and this:
 
  1. $('#trigger').click(function(){ alert($(this).closest('tr').html()); }); 
I get this:
 
  1. <td> <button id=trigger> Button </button> </td>  
But i need:
 
  1. <tr id=ok>
      <td> <button id=trigger> Button </button> </td>  
    </tr>

 

How do i do without use parent() ? or what i'm doing wrong?