#slideshow{
/* background: transparent; */
 height: 240px;
 margin-right: auto;
 margin-left: auto;
 overflow: hidden;
 position: relative;
 width: 320px;
 z-index: 0;
 }

#slideshow img{
 background: transparent;
 left: 0;
 position: absolute;
 top: 0;
 visibility: hidden;
 z-index: -1;
 }