<DT><B>Returns:</B><DD>Return the node that is the result of the parse operation. If 
   the result is more than one top-level node, the first one is 
   returned.<DT><B>Throws:</B><DD><A HREF="../../../../org/w3c/dom/DOMException.html">DOMException</A> - HIERARCHY_REQUEST_ERR: Raised if the content cannot replace, be 
   inserted before, after, or as a child of the context node (see also 
   <code>Node.insertBefore</code> or <code>Node.replaceChild</code> in [<a href='http://www.w3.org/TR/2004/REC-DOM-Leve