<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>轮播图带遮罩层</title>
<style type="text/css">
html,body,ul,li{ width: 100%;min-width: 1000px;margin: 0;padding: 0;}
ul,li,ol{ list-style:none;}
/*---轮播效果---*/
.slide-oute {position: relative;width: 100%;height: 378px;background-color: #fff; overflow: hidden;}
.scroll { width: 1000px;height: 378px;margin: auto;position:relative ; background-color: #f5f5f9;}
.scroll ul {height: 100%; position:absolute;left:0;top:0;}
.scroll li { width: 1000px; float: left;overflow: hidden;}
.scroll li img {float: left; width: 100%;}
/*遮罩层效果*/
.mask {width:100%;height:378px;position: absolute;top: 0;}
.mask-left{height:100%;position: absolute;left:0;right:50%;margin-right:500px; background-color: rgba(31,26,26, 0.25 )}
.mask-cont{width:1000px;height:100%;position: absolute;left: 50%;margin-left: -500px}
.mask-right{height:100%;position: absolute;left:50%;right:0;margin-left:500px;background-color: rgba(31,26,26, 0.25 )}
/*-轮播效果结束-*/
</style>
</head>
<body>
<!--轮播开始-->
<div class="slide-oute">
<div class="scroll">
<ul>
<li><img src="images/banner1.jpg" /></li>
<li><img src="images/banner2.jpg" /></li>
<li><img src="images/banner3.jpg" /></li>
<li><img src="images/banner4.jpg" /></li>
</ul>
</div>
<div class="mask" style="">
<div class="mask-left"></div>
<div class="mask-cont"></div>
<div class="mask-right"></div>
</div>
</div>
<!--轮播结束-->
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript">
$(function(){
slide();
});
/*轮播图*/
function slide(){
var oDiv= $(‘.mask‘), //最外层div
oUl= $(‘.scroll ul‘), //中间层ul
oLi= $(‘.scroll ul li‘), //每一个板块li
speed=-1000, //每次移动距离
time = 2000; //动画时间
//复制两份ul里面的内容到ul中，为的是实现无缝
oLi.clone(true).appendTo(oUl);
var oli = oUl.children("li"),
Length = oli.length , //li标签个数
oUlwidth = oli.eq(0).width()*Length+‘px‘; //ul的总宽aaaa度
//计算新的ul的长度
oUl.css("width",oUlwidth);
//设置速度
function move(){
//向左移动
if(oUl[0].offsetLeft<=-oUl[0].offsetWidth/2){
oUl[0].style.left=‘0‘;
}
//设置ul的left值
oUl[0].style.left=oUl[0].offsetLeft+speed+‘px‘; //每次增加移动距离
}
var timer=setInterval(move,time);
//左右按钮控制效果
oDiv.hover(function(){
clearInterval(timer);
},function(){
clearInterval(timer);
timer=setInterval(move,time);
});
}
</script>
</body>
</html>
原文：http://my.oschina.net/Weiwanbinblogs/blog/343998