.slideshow {
    width: 100%;
    height: 230px;
    margin: 2em auto;
    overflow: hidden;
    float:left;
    }
.slideshow ul {
    width: 200%;
    height: 100%;
    padding:0; margin:0;
    list-style:none;
    }

.slideshow li { float: left; margin-right:20px;}

.slideshow img {
    width: 250px;
    height:100%;
}