#marker {
    display:none;
    position:absolute;
    left:0;
    top:0;
    filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/marker.png', sizingMethod='scale');
    width:50px;
    height:50px;
}

#markercontainer {
    position:relative;
    width:550px;
    margin:0;
    padding:0;
}

#markercontainer > #marker { background-image:url(../images/marker.png); }