轮播效果

main.js

$(document).ready(function(){
    var num=$('.weichuangyi_span span').length;
    var i_mun=0;
    var timer_banner=null;

    $('.weichuangyi_ul li:gt(0)').hide();//页面加载隐藏所有的li 除了第一个
    
//底下小图标点击切换
    $('.weichuangyi_span span').click(function(){
        $(this).addClass('weichuangyi_span_one')
               .siblings('span').removeClass('weichuangyi_span_one');
        var i_mun1=$('.weichuangyi_span span').index(this);
        $('.weichuangyi_ul li').eq(i_mun1).fadeIn('slow')
                               .siblings('li').fadeOut('slow');

        i_mun=i_mun1;
    });
    
//左边箭头点击时切换
    $('.weichuangyi_left').click(function(){
        if(i_mun==0){
            i_mun=num
        }
        //大图切换
        $('.weichuangyi_ul li').eq(i_mun-1).fadeIn('slow')
                                   .siblings('li').fadeOut('slow');
        //小图切换
        $('.weichuangyi_span span').eq(i_mun-1).addClass('weichuangyi_span_one')
                   .siblings('span').removeClass('weichuangyi_span_one');

        i_mun--
    });

    //左边按钮移动到其上时更换背景图片
    $('.weichuangyi_left').mouseover(function(){
        
        $('.weichuangyi_left').addClass('weichuangyi_left1');
    });

    //左边按钮移动到其上时还原背景图片
    $('.weichuangyi_left').mouseout(function(){
        
        $('.weichuangyi_left').removeClass('weichuangyi_left1');
    });

//右边箭头点击时切换
    $('.weichuangyi_right').click(function(){
        move_banner()
        
    });

    //右边按钮移动到其上时更换背景图片
    $('.weichuangyi_right').mouseover(function(){
        
        $('.weichuangyi_right').addClass('weichuangyi_right1');
    });

    //右边按钮移动到其上时更换背景图片
    $('.weichuangyi_right').mouseout(function(){
        
        $('.weichuangyi_right').removeClass('weichuangyi_right1');
    });
    
//鼠标移动到幻灯片上时 显示左右切换案例
    $('.weichuangyi').mouseover(function(){
        $('.weichuangyi_left').show();
        $('.weichuangyi_right').show();
    });

//鼠标离开幻灯片上时 隐藏左右切换案例
    $('.weichuangyi').mouseout(function(){
        $('.weichuangyi_left').hide();
        $('.weichuangyi_right').hide();
    });
    
    //自动播放函数
    function bannerMoveks(){
        timer_banner=setInterval(function(){
            move_banner()
        },4000)
    };
    bannerMoveks();//开始自动播放

    //鼠标移动到banner上时停止播放
    $('.weichuangyi').mouseover(function(){
        clearInterval(timer_banner);
    });

    //鼠标离开 banner 开启定时播放
    $('.weichuangyi').mouseout(function(){
        bannerMoveks();
    });


//banner 右边点击执行函数
   function move_banner(){
            if(i_mun==num-1){
                i_mun=-1
            }
            //大图切换
            $('.weichuangyi_ul li').eq(i_mun+1).fadeIn('slow')
                                       .siblings('li').fadeOut('slow');
            //小图切换
            $('.weichuangyi_span span').eq(i_mun+1).addClass('weichuangyi_span_one')
                       .siblings('span').removeClass('weichuangyi_span_one');

            i_mun++
        
        }

})

 style.css

/* CSS Document */
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td,a,div,img{
    padding: 0; margin: 0;
}
table{
    border-collapse:separate;
    border-spacing:0;
}
img {
    border: 0;
        margin:0; 
} 
ul,li{
    list-style: none;
}
 
h1,h2,h3,h4,h5,h6{
    font-weight: normal;
    font-size: 100%;
} 
a{
    color:#514339;
    text-decoration:none;
}
a:hover{
    color:#c10000;
    text-decoration:underline;
}
body{ 
  padding-top:60px;
  font-size: 13px;
  color: #514339;
}
/*CSS初始化结束*/


/*幻灯片CSS开始*/
.weichuangyi {
    width:1000px;
    height:400px;
    margin:0 auto;
    position: relative;
}
.weichuangyi_main{
    width:1000px;
    height:auto;
    position: absolute;
    left:0;
    top:0;
}
.weichuangyi_main li a img {
    display:block;
    width:1000px;
    height:400px;
    position: absolute;
    left:0;
    top:0;
}
.weichuangyi_span {
    width:1000px;
    height:35px;
    position: absolute;
    left:0;
    bottom:0;
    zoom:1;
}
.weichuangyi_span span {
    width:15px;
    height:15px;
    display:block;
    float:left;
    margin-left:10px;
    background: url(../images/dot.png) no-repeat left bottom;
}
.weichuangyi_span p {
    width:100px;
    height:35px;
    margin:0 auto;
}
.weichuangyi_span .weichuangyi_span_one{
    background: url(../images/dot.png) no-repeat left top;
}
.weichuangyi_left {
    width:60px;
    height:90px;
    cursor: pointer;
    background:#000 url(../images/ad_ctr.png) no-repeat 5px -180px;
    filter:alpha(opacity:50);opacity:0.5;
    position: absolute;
    left:0;
    top:155px;
    display:none;
}
.weichuangyi_left1 {
    background:#000 url(../images/ad_ctr.png) no-repeat 3px top;
}
.weichuangyi_right {
    width:60px;
    height:90px;
    cursor: pointer;
    background:#000 url(../images/ad_ctr.png) no-repeat -5px bottom;
    filter:alpha(opacity:50);opacity:0.5;
    position: absolute;
    right:0;
    top:155px;
    display:none;
}
.weichuangyi_right1 {
    background:#000 url(../images/ad_ctr.png) no-repeat -3px -90px;
}
/*幻灯片css结束*/

index.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>微创意jQuery flexslider焦点图</title>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/main.js"></script>

<link rel="stylesheet" type="text/css" href="css/style.css" />


</head>
<body>


<div class="weichuangyi">
    <div class="weichuangyi_main">
        <ul class="weichuangyi_ul">
            <li><a href="http://www.seosiwei.com/" class="img"><img src="images/ad_yuetu.jpg"  alt="微创意" /></a></li>
            <li><a href="http://www.seosiwei.com/" class="img"><img src="images/ad_nba.jpg"    alt="微创意" /></a></li>
            <li><a href="http://www.seosiwei.com/" class="img"><img src="images/ad_stock.jpg"  alt="微创意" /></a></li>
            <li><a href="http://www.seosiwei.com/" class="img"><img src="images/ad_auto.jpg"   alt="微创意" /></a></li>
        </ul>
    </div>
    <p class="weichuangyi_left"></p>
    <p class="weichuangyi_right"></p>
    <div class="weichuangyi_span">
    <p> 
        <span class="weichuangyi_span_one"></span> 
        <span></span> 
        <span></span>
        <span></span>
    </p> 
    </div>
</div>
    
<div style="text-align:center;margin-top:25px;font-size:18px;font-weight:bold;clear:both">
<p>来源：<a href="http://www.seosiwei.com/" target="_blank">微创意原创jquery教程</a></p>
</div>
</body>
</html>