body, html {
   	height: 100%;
  	margin: 0;
  	background-image: url("../image/ctc_01.jpg");
  	height: 100%; 
  	background-position: center;
  	background-repeat: no-repeat;
  	background-size: cover;
}
.topnav {
	background-color: #333;
  	overflow: hidden;
}

.container {
  	overflow: hidden;
}

.sidenav {
	position: absolute;
	background-color: #333;
  	overflow: hidden;
  	top: 40px;
  	bottom: 0px;
  	left:0px;
  	width: 150px;
}

.userscr {
	position: absolute;
  	overflow: hidden;
  	top: 40px;
  	bottom: 0px;
  	left:150px;
    right:0px;
}