html, body {
    margin: 0; padding:0; border: 0;
    overflow: hidden
}

#header {
  position: relative;
}

.topright {
  position: absolute;
  top: 0px;
  right: 10px;
}

.middle_left {
  position: absolute;
  top: 0px;
  left: 300px;
}

.middle_right {
  position: absolute;
  top: 8px;
  right: 100px;
}

.middle {
    position: absolute;
    width: 100%;
    top: 45px;
    bottom: 0px;
}

.scroll_area {
    overflow-y: scroll;
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
}

.invalid_order {
    color: red;
    font-weight: bold;
}