.swipe_gallery_container {
    position: relative;
}
.swipe_gallery_container img.swipe_left {
    position: absolute;
    top: 50%;
    left: 10px;
    z-index: 20;
}
.swipe_gallery_container img.swipe_right {
    position: absolute;
    bottom: 50%;
    right: 10px;
    float: right;
}