body {
    margin: 0;
    background: #555;
}
 
#container {
    width: 1200px;
    margin: 0 auto;
    border-right: 1px solid #4f4f4f;
    border-left: 1px solid #4f4f4f;
    background: #ccc;
}
 
#header {
    width: 100%;
    height: 50px;
    background: #3b5998;
    position: fixed; 
    top:0px;
}
 
#content { 
    position: absolute;
    top: 70px;
    right: 0; 
    width: 85%;
    padding: 10px;
    /* float: left; */
    background: #fff;
    margin: 0px 0px 0px 0px; 
}
 
#sidebar { 
    position: fixed;
    width: 15%;
    padding: 10px;
    /* float: left; */
    background: #ccc;
    top: 70px;
    left: 0px;
    margin: 0px 0px 0px 0px;
}
 
#footer {
    clear: both;
    width: 100%;
    height: 150px;
    background: #3b5998;
}