body, html {
  width: 100%;
  height: 100%;
  margin: 0;
}

.container {
  width: 1280px;
  height: 800px;
}

.leftpane {
    width: 25%;
    height: 100%;
    float: left;
    background-color: #C0C0C0;
    border-collapse: collapse;
}



.rightpane {
  width: 75%;
  height: 100%;
  position: relative;
  float: right;
  background-color: #C0C0C0;
  border-collapse: collapse;
}

.toppane {
  width: 100%;
  height: 5%;
  border-collapse: collapse;
  background-color: #2D6ABF;
}

.midtop {
  width: 100%;
  height: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
}

.middown {
  width: 100%;
  height: 20%;
  border-collapse: collapse;
  background-color: #ffffff;
}