title: Selecting table columns (jQuery)
body: <p>I want to give ALL (including <code>&lt;th&gt;</code>) cells of FIRST and LAST columns some specific classes, I tried this:</p>
  
  <pre><code>$("table tr:first-child td:first-child").addClass("first-col-cell");
  $("table tr:last-child td:last-child").addClass("last-col-cell");
  </code></pre>
  
  <p>..but it doesn't seem to work.</p>
  
  <p>Would appreciate any help. </p>