title: CSS border-spacing for every other row
body: <p>I am targeting Chrome and other CSS3 compliant browsers and would like to have border separation for every other row.
  The CSS I currently have working for every row looks like this-</p>
  
  <pre><code>table{
    border-collapse:separate;
    border-spacing: 0px 3px;
  }
  td{
      border: 1px solid black;
      padding: 5px;
  }
  </code></pre>
  
  <p>What I would like to achieve is this:</p>
  
  <p><strong>CSS</strong></p>
  
  <pre><code>table{
    border-collapse:separate;
  }
  table tr:nth-of-type(odd){
    border-spacing: 0px 3px;      
  }
  td{
      border: 1px solid black;
      padding: 5px;
  }
  </code></pre>
  
  <p><strong>HTML</strong></p>
  
  <pre><code>&lt;table&gt;
      &lt;tr&gt;
          &lt;td&gt;a-one&lt;/td&gt;&lt;td&gt;a-two&lt;/td&gt;&lt;td&gt;a-three&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;a-four&lt;/td&gt;&lt;td&gt;a-five&lt;/td&gt;&lt;td&gt;a-six&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;b-one&lt;/td&gt;&lt;td&gt;b-two&lt;/td&gt;&lt;td&gt;b-three&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;b-four&lt;/td&gt;&lt;td&gt;b-five&lt;/td&gt;&lt;td&gt;b-six&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;c-one&lt;/td&gt;&lt;td&gt;c-two&lt;/td&gt;&lt;td&gt;c-three&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;c-four&lt;/td&gt;&lt;td&gt;c-five&lt;/td&gt;&lt;td&gt;c-six&lt;/td&gt;
      &lt;/tr&gt;       
  &lt;/table&gt;
  </code></pre>
  
  <p>The data is in two row sets and needs to be connected, whereas different sets need to be separated.  I would like to keep it in table form to take advantage of the browsers auto-column widths.  It seems like border-spacing can only be achieved on the table level.  I am already using borders for styling so transparent borders is not a viable option.
  Any chance for me- or I am I stuck?
  JS-fiddle here identical to above here: <a href="http://jsfiddle.net/sSba4/" rel="nofollow">http://jsfiddle.net/sSba4/</a></p>