title: data.find('#myDiv') is not a function in $.post request
body: <p>why can't i select the div i need using $.post?</p>
  
  <p>trying at callback function:</p>
  
  <pre><code>$.post("file.php", { param_s: $('#input').val()},
                 function(data) {
                   $('#'+donde).html(data.find('#router').html);
  
  });
  </code></pre>
  
  <p>And firebug jumps:</p>
  
  <blockquote>
    <p>data.find is not a function</p>
  </blockquote>
  
  <p>normally i would <code>$('#where').load('file.php?param=foo #myDiv')</code> but this file responds by <code>$_POST</code>..</p>
  
  <p>how can i manipulate the data response so i can filter the desired selector?</p>