#pics {
	width: 600px;
	height: 450px;
	position: fixed;
	margin: 0;
	border: 0;
	top: 0;
	left: 0;
	z-index: -1;
	opacity: 0.5;
	filter: alpha(opacity=50);
}

#pics img {
	border: 10px solid #ccc;
}