title: Insert select control into DataTable using fnUpdate
body: <p>Suppose I build an HTML string for a select box <code>htmlDDL</code> and want to replace the contents of a cell with position <code>(x,y)</code> with the select box.</p>
  
  <p>I tried doing:</p>
  
  <pre><code>oTable.fnUpdate(ddlSubset, rowNum, 3, false);
  oTable.fnUpdate(ddlSubset.get(), rowNum, 3, false);
  oTable.fnUpdate(ddlSubset.html(), rowNum, 3, false);
  oTable.fnUpdate(ddlSubset.contents(), rowNum, 3, false);
  </code></pre>
  
  <p>but I get something like:</p>
  
  <pre><code>[object Object]
  [object HTMLSelectElement]
  </code></pre>
  
  <p>text rendered rather than a nice select control.</p>
  
  <p>Can I use <code>fnUpdate</code> to replace the cell contents with a new control?</p>
  
  <p>If so, how?</p>
  
  <p>If not, is there a workaround available?</p>