无缝轮播

/* 全局样式设置 */
*{
	margin:0;
	padding:0;
}
h1{
	text-align: center;
	/*line-height: 100px;*/
}
a{
	text-decoration: none;
}
/* 设置轮播图样式 */
/* 图片显示样式 */
.banner_slider{
	position: relative;
	background-color: green;
	margin:0 auto;
	width:500px;
	height: 380px;
	overflow:hidden;
}
.banner_slider_pics{
	width:3000px;
	height: 100%;
	margin:0 auto;
	position: relative;
	left:-500px;
}
.banner_slider_pics>a{
	width: 500px;
	height: 380px;
	display: block;
	float: left;
	text-align:center;
}
.banner_slider_pics>a> img{
	width: 100%;
	height: 380px;
}
/* 上一张，下一张按钮样式 */
.banner_slider_arrow{
	width: 500px;
	height: 40px;
	position: absolute;
	left: 0;
	bottom: 50%;
	margin-bottom: -20px;
}
.arrow_item{
	font-size: 25px;
	font-weight: bold;
	color: #fff;
	background-color: rgba(0,0,0,.6);
	opacity: .6;
}
.arrow_item:hover{
	opacity: .8;
}
.prev{
	position: absolute;
	left: 10px;
	padding:10px 7px 10px 7px;
}
.next{
	position: absolute;
	right: 10px;
	padding:10px 7px 10px 7px;
}
/* 圆点按钮 */
.banner_slider_dots{
	width: 100%;
	height: 30px;
	line-height: 30px;
	position: absolute;
	bottom: 10px;
	text-align: center;
}
.dots_item{
	display: inline-block;
	width:10px;
	height: 10px;
	background-color: #999;
	border-radius:50%;
	border:3px solid #fff;
	margin-right: 10px;
}
.dots_active{
	background-color: #fff;
	border-color:orange;
}