title: Find table cell knowing row and column ids with jQuery
body: <p>I have a simple table, where I have set IDs for headers and IDs for rows. Given an ID for both, I need to find a corresponding cell at the intersection of those two.</p>
  
  <p>Example:</p>
  
  <pre><code>&lt;table id="tablica"&gt;
      &lt;thead&gt;
          &lt;th id="bla"&gt;Bla&lt;/th&gt;
          &lt;th id="bli"&gt;Bli&lt;/th&gt;
          &lt;th id="blu"&gt;Blu&lt;/th&gt;
      &lt;/thead&gt;
      &lt;tbody&gt;
          &lt;tr id="jedan"&gt;
              &lt;td&gt;1&lt;/td&gt;            
              &lt;td&gt;2&lt;/td&gt;
              &lt;td&gt;3&lt;/td&gt;
          &lt;/tr&gt;
          &lt;tr id="dva"&gt;
              &lt;td&gt;4&lt;/td&gt;            
              &lt;td&gt;5&lt;/td&gt;
              &lt;td&gt;6&lt;/td&gt;
          &lt;/tr&gt;
          &lt;tr id="tri"&gt;
              &lt;td&gt;7&lt;/td&gt;            
              &lt;td&gt;8&lt;/td&gt;
              &lt;td&gt;9&lt;/td&gt;
          &lt;/tr&gt;
      &lt;/tbody&gt;
  &lt;/table&gt;​​​
  </code></pre>
  
  <p>So if I have id="bli" and id="dva", that means I want to do something with cell having value 5 in this example.</p>
  
  <p><strong>edit:</strong> There are a lot of correct answers, I upvoted all of them, but unfortunately I can only choose one as correct.</p>