* {
	margin:0;
	padding:0;
}
.container {
	position:relative;
	margin:100px auto;
	/*
		设置图片的宽高(和图片一致则不用再同步图片宽高)
	*/
	width:500px;
	height:500px;
	border:1px solid yellow;
	/*边框可去除*/
	overflow:hidden;
}
.container img {
	/*
		设置图片的宽高(和图片一致只设置上面)
	*/
}
.container a {
	display:none;
}
/* 当前正显示图片 */
.container a.current {
	display:block;
}
.container ul {
	position:absolute;
	top:95%;
	left:50%;
	margin:-40px;
	/* ul的一半宽度,便于居中 */
	list-style:none;
}
.container li {
	float:left;
	width:10px;
	height:10px;
	margin-right:10px;
	background-color:#fff;
	border-radius:50%;
}
.container li.current {
	background-color:#00f;
	opacity:0.5;
	/*兼容IE8-*/
	filter:alpha(opacity=50);
}
.left,.right {
	position:absolute;
	font-size:30px;
	padding:0px 5px;
	top:50%;
	margin-top:-20px;
	color:#fff;
	background-color:#222;
	opacity:0;
	/*兼容IE8-*/
	filter:alpha(opacity=50);
}
.left:hover,.right:hover,.container li {
	cursor:pointer;
}
.right {
	right:0px;
}