title: how to use table tr:odd td in html
body: <p>When I define this CSS in HTML I found that they not show me even in Firebug but I see after edit button Firebug CSS panel [tab]</p>
  
  <pre><code>#tbl tr:odd td{
      background: none repeat scroll 0 0 #FFFFFF;
  }
  </code></pre>
  
  <p>well I want to make <code>tr</code>'s background color <code>#FFF</code>.</p>