#slideshow { width: 790px; height: 420px; margin: 0 auto; position: relative; }

.slide { 
	display: none;
	border: 10px solid white;
	width: 760px;
	height: 400px;
	margin: 0 auto;
	box-shadow: 1px 1px 7px #333;
	position: absolute;
	top: 0;
	left: 0;
}
.slide:first-child { display: block; }