div{
    width: 500px;
    margin-left: auto;
    margin-right: auto;
    border: 1px solid black;
}
.fullwrap{
    height: 600px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}
.header, .footer{
    position: absolute;
    left: 10px;
    width: 480px;
}
.header{
    top: 10px;
    height: 50px;
}
.wrap{
    position: relative;
    top: 70px;
    left: 0;
    height: 400px;
    width: 480px;
}
.footer{
    bottom: 15px;
    height: 105px;
}
.main, .sidebar{
    height: 380px;
    position: absolute;
    top: 10px;
}
.main{
    width: 240px;
    left: 10px;
}
.sidebar{
    width: 200px;
    right: 10px;
}