body {
    margin: 0;
    padding: 0;
}
#container {
    width: 750px;
    margin-left: auto;
    margin-right: auto;
    border:1px solid black;
}
#header {
    height: 150px;
    background: #9CF;
}
#left {
    width: 170px;
    float: left;
    background: #ABC;
}
#right {
    width: 580px;
    float: left;
    background: #9FF;
}
#footer {
    clear: both;
    background: #999;
}