body, html {
    background-image:url("bg.gif");
    background-repeat: no-repeat;
    background-size: cover;
    height: 100%;
    overflow: hidden;
}

#container {
   position: relative;
}

#image {
   position: absolute;
   top: 50%;
   left: 50%;
   width: 500px;
   height: 108px;
   margin: -100px 0 0 -250px;
}

#background {
   position: absolute;
   top: 0;
   left: 0;
   bottom: 0;
   right: 0;
   z-index: -1;
}