div.leftnav {
    position:absolute;
    background-color:#FFF;
    top:36%;
    left: 4%;
    width:20%;
    height: 300px;
    -moz-border-radius: 10px;
  -khtml-border-radius: 10px;
  -webkit-border-radius: 10px;
    -moz-box-shadow: 0px 0px 8px rgba(0,0,0,0.3);
  -khtml-box-shadow: 0px 0px 8px rgba(0,0,0,0.3);
  -webkit-box-shadow: 0px 0px 8px rgba(0,0,0,0.3);
}