body {
  background: #005;
  margin-left:40px;
}

#container {
  background: #fff;
  width: 90%;
  min-width: 700px;
  min-height:800px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 3%;
}

h1 {
  text-align: center;
  padding-top:10px;
}

#messages {

  height: 400px;

  margin-left: 50px;
  overflow:scroll;
}

#userlist {float: right;

  height:400px;
  overflow:scroll;

}

  .hidden 
    {position:absolute;
    left:0px;
    top:-500px;
    width:1px;
    height:1px;
    overflow:hidden;
}