#mask {
  position:absolute;
  left:0;
  top:0;
  z-index:9000;
  background-color:#000;
  display:none;
}
.window {
  position:absolute;
  left:0;
  top:0;
  width:440px;
  height:200px;
  display:none;
  z-index:9999;
  padding:20px;
}

#courseschedule {
    background-color: #FFFFFF;
    border: 5px solid #0C2D50;
    height: 657px;
    padding: 0;
    width: 800px;
}