code: function (element, tagName) {
              if (tagName.indexOf(",") === -1)
                  return element.getElementsByTagName(tagName);
              return element.querySelectorAll(tagName);
          }
docs: Find elements by tag name(s).
  
  @param       element         Element to search within
  @param       string          Tag name(s) to find
  @returns     HTMLCollection  List of elements