code: function addElements(newElements, ownerDocument) {
      var elements = html5.elements;
      if(typeof elements != 'string'){
        elements = elements.join(' ');
      }
      if(typeof newElements != 'string'){
        newElements = newElements.join(' ');
      }
      html5.elements = elements +' '+ newElements;
      shivDocument(ownerDocument);
    }
docs: Extends the built-in list of html5 elements
  @memberOf html5
  @param {String|Array} newElements whitespace separated list or array of new element names to shiv
  @param {Document} ownerDocument The context document.