public Node attr(final String attr,final Object value) throws IOException {
  m_writer.write(" " + attr + "=\""+ attrib(value.toString())+ "\"");
  m_attrs++;
  return this;
}

public Node attr ( final String attr , final Object value ) throws IOException { m_writer . write ( " " + attr + "=\"" + attrib ( value . toString ( ) ) + "\"" ) ; m_attrs ++ ; return this ; }
add an attribute value to an open element head .
