.leftbg{ background-image: url(left_image.jpg); background-repeat: no-repeat; background-attachment: scroll; background-position: right top; vertical-align: top; width: 269px; height: auto; visibility: visible; list-style-type: none; }
.rightbg{ background-image: url(right_image.jpg); background-repeat: no-repeat; background-attachment: scroll; background-position: left top; vertical-align: top; width: 269px; height: auto; overflow: auto; visibility: visible; list-style-type: none; }
.centerbg{ background-image: url(center_image.jpg); background-repeat: no-repeat; background-attachment: scroll; background-position: center top; vertical-align: top; width: 742px; height: 280px; overflow: auto; visibility: visible; list-style-type: none; }