#header {
    background-color: #eee;
      border: 1px solid;  
}

#footer {
    clear: both;
    background-color: #eee;
    border: 1px solid;
}

#sidebar {
    float:left;
    width: 15%;
    background: #eee;
    border-right: 1px solid;
    border-bottom: 1px solid;
    border-left: 1px solid;
}
#content {
    float: right;
    width: 80%;
}