#ajax_message {
  position:fixed;
  top:0px;
  left:0px;
  width:100%;
}
.error_message {
  background-color:#990000;
  color:#ffffff;
  font-weight:bold;
  text-align:center;
  z-index:100;
}
.success_message {
  background-color:#FFFF00;
  color:#000000;
  font-weight:bold;
  text-align:center;
  z-index:100;
}