 an ancestor 
   of <code>refNode</code> is an Entity, Notation, or DocumentType 
   node.<DD><CODE>org.w3c.dom.DOMException</CODE> - INDEX_SIZE_ERR: Raised if <code>offset</code> is negative or greater 
   than the number of child units in <code>refNode</code>. Child units 
   are 16-bit units if <code>refNode</code> is a type of CharacterData 
   node (e.g., a Text or Comment node) or a ProcessingInstruction 
   node. Child units are Nodes in all other cases.
   <br>INVALID_STATE_ERR: Raised if <code>deta