body{
	margin: 0px;
}
.focus{
	overflow: hidden;
	position: relative;
	cursor: pointer;
}
.focus ul{
	position: relative;
	width: 800%;
	padding: 0px;
	margin: 0px;
}
.focus li{
	float: left;
	width:12.5%;
	position: relative;
	list-style: none;
}
.focus img{
	width: 100%;
	display: block;
}
.btn{
	position: absolute;
	z-index: 99;
	font-size: 0px;
}
.btn span{
	display: inline-block;
}
.prenext{
	position: absolute;
	top: 50%;
	z-index: 200;
	display: inline-block;
}
.pre{
	left: 0px;
}
.next{
	right: 0px;
}