[ayuda], es decir, y mozilla

@charset "utf-8";
body {
    background-image: url(images/bg.jpg);
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: fixed;
}
#sidebar {
    position: absolute;
    width: 174px;
    right: 200px;
    top: 80px;
}
#content {
    position: absolute;
    height: 358px;
    width: 440px;
    left: 172px;
    top: 160px;
}
#footer {
    background-color: #8B8B8B;
    position: absolute;
    width: 702px;
    bottom: 23px;
    text-align: center;
    left: 148px;
    padding-top: 5px;
    padding-bottom: 5px;
}
.footer {
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: x-small;
    color: #333333;
}