title: Build a selector
body: <p>i try to build my own selector but I get errors.</p>
  
  <p>firebug tell me:</p>
  
  <p>missing ) after argument list</p>
  
  <pre><code>$("#for_" + $(this)attr('id') + "").click(function() {
  
      alert($(this).attr("id"));
  
  });
  </code></pre>
  
  <p>could somebody help me plaese?</p>