#chatlist {
  width: 570px;
  clear: both;
  margin: 5px auto;
}
#chatlist .viewport {
  width: 550px;
  height: 600px;
  overflow: hidden;
  position: relative;
}
#chatlist .overview {
  list-style: none;
  position: absolute;
  left: 0;
  top: 0;
}
#chatlist .thumb .end,
#chatlist .thumb {
  background-color: #b8a01e;
}
#chatlist .scrollbar {
  position: relative;
  float: right;
  width: 15px;
}
#chatlist .track {
  background-color: #233f52;
  height: 100%;
  width: 13px;
  position: relative;
  padding: 0 1px;
}
#chatlist .thumb {
  height: 20px;
  width: 13px;
  cursor: pointer;
  overflow: hidden;
  position: absolute;
  top: 0;
}
#chatlist .thumb .end {
  overflow: hidden;
  height: 5px;
  width: 13px;
}
#chatlist .disable {
  display: none;
}