div.demo {
	border: 1px solid #555;
  margin: 1em auto;
	width: 550px;
}
#test1 {
	height: 200px;
}
#test2 {
	height: 200px; width:950px;
}
#test3, #test4 {
	height: 200px; width:700px;
}
div.right {
	font-size: 90%;
	right: 10%;
	padding-right: 1.2em;
	position: absolute;
	width: 90px;
}
div.right button {
	width: 90px;
}
div.caption {
	position: absolute;
	margin-top: -75px;
	margin-left: -75px;
	width: 150px;
	text-align: center;
	left: 50%;
	padding: 5px 10px;
	background: black;
	color: white;
	font-family: sans-serif;
	border-radius: 10px;
	display: none;
}