.muestra{
	height: 300px;
	width: 400px;
	border: 5px solid #C00;
	margin: 20px;
	padding: 20px;
}

.anterior, .posterior{
	height: 100px;
	width: 200px;
	border: 2px solid #30F;
	padding: 5px;
}

div{
	background: url(../img/f01.png) left bottom repeat-x,
	url(../img/f02.png) left bottom no-repeat,
	url(../img/f03.png) left top repeat-x;
	background-color: #a4d3ff;
}