.lavaLampWithImage li.back {
    background: url("/images/menu/menu_left.jpg") no-repeat top left;
    width: 9px; height: 18px;
    z-index: 8;
	margin:-2px 0 0 0;
    position: absolute;
}
.lavaLampWithImage li.back .left {
	background: url("/images/menu/menu_right.jpg") no-repeat top right;
    height: 18px;
	width:100%;
    margin-right: 9px; /* 7px is the width of the rounded shape */
}