* {
	padding:0;
	margin:0;
}
.box {
	width:500px;
	height:400px;
	margin:20px auto;
	position:relative;
	border:1px solid #ccc;
}
a {
	display:none;
	width:500px;
	height:400px;
	color:#fff;
	text-align:center;
	font:700 100px/400px "simsun";
}
ul {
	position:absolute;
	bottom:30px;
	left:50%;
	list-style:none;
	margin-left:-55px;
}
li {
	float:left;
	width:18px;
	height:18px;
	background-color:black;
	margin:0 2px;
	cursor:move;
	border-radius:9px;
	color:#fff;
	text-align:center;
	line-height:18px;
}
.arrow span {
	position:absolute;
	top:50%;
	width:38px;
	height:60px;
	color:#fff;
	text-decoration:none;
	font:700 36px/60px "simsun";
	text-align:center;
	background:rgba(0,0,0,.3);
	margin-top:-30px;
	cursor:pointer;
}
#arrow-l {
	left:0;
}
#arrow-r {
	right:0;
}
.arrow span:hover {
	background:rgba(0,0,0,.8);
}
.current {
	background-color:red;
}
.show {
	display:block;
}