title: How to select the even and first td of rows with attribute data-mainRow using jquery?
body: <p>I tried this: </p>
  
  <pre><code>  $("#topTable tr[data-mainRow]").find("td:first:even").css("background-color","black");
  </code></pre>
  
  <p>This does not work because it hightlight all rows first td....</p>