#cx_werbung {
  text-align: center;
}

#cx_werbung a.cx_schliessen {
  background: #000;
  color: #fff;
  display: block;
  margin: 0 auto;
  font-family: arial;
  font-size: 12px;
  margin-top: 3px;
  margin-bottom: 3px;
  width: 100px;
  padding: 3px 0;
}