Plain Code

body, html {
    margin: 0;
    padding: 0;
    background-color:#999999;
}

#container {
    margin: 0 auto;
    width: 900px;
}

#header {
    width: 900px;
    height: 121px;
}

    #leftheader {
        float: left;
        background: #693 url('img/topleft.gif') no-repeat;
        width: 132px;
        height: 121px;
    }

    #middleheader {
        float:left;
        background: #693;
        width: 636px;
        height: 121px;
        background-image:url('img/header.gif');
        background-repeat:no-repeat;
    }
    
    #rightheader {
    float: left;
    background: #693 url('img/topright.gif') no-repeat;
    width: 132px;
    height: 121px;
    }

#content {
    clear:both;
    width:900px;
    text-align:left;
    background-image:url('img/background.gif');
    background-repeat:repeat-y;
}

#contentleft {
    float:left;
    width:132px;
}

#contentmiddle {
    float:left;
    width:636px;

}

#contentright {
    float:left;
    width:132px;
}