/* Clear border/background colours from error fields */
  var elements = document.getElementsByClassName("fieldError");
  for (var i = 0; i < elements.length; ++i)
    elements[i].addEventListener("focus", function ()
                                          {
                                            this.style.backgroundColor="#FFF"
                                            this.style.borderColor="#000"
                                          },
                                          false
                                 );