基于JS实现仿百度百家主页的轮播图效果

 <div class="ShowEntry"> 
     <!-- <div id="widget_content_player" class="Player" alog-group="log-player">-->
       <!--------- 右击箭头--------->
       <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" id="widget_content_player_prev" class="prev carousel-btn-prev">
        <span class="icon-wrap"><img src="image/箭头左.png"></span>
       </a>
       <div id="widget_content_player_wrapper" class="player">
        <!---------- 一张大图和涂上的文字 ------->
        <div id="widget_content_player_imgView" class="imgview">
          <!---------- 一张大图 ------->
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="http://d.hiphotos.baidu.com/news/q%3D100/sign=da32af9f01fa513d57aa68de0d6c554c/c75c10385343fbf2f9ac9c60b97eca8064388ff4.jpg" hadcut="1" class="active" style="width: 100%; height: 100%; opacity: 1;">
          </a>
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="image/95eef01f3a292df570506750b5315c6035a873e0.jpg" style="width: 100%; height: 100%; opacity: 1;">   
         </a>
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="image/0824ab18972bd407e8f01db872899e510fb30944.jpg.png" style="width: 100%; height: 100%; opacity: 1;">   
          </a>
          <a href="" target=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" _blank" mon="a=12&amp;col=1&amp;pn=2">
          <img src="image/9825bc315c6034a8cfd58fc7c213495409237644.jpg" style="width: 100%; height: 100%; opacity: 1;">   
          </a>
          <!--<div class="readnum"><span class="tit">阅读数</span><span class="num" data-read="16913">16913</span></div>-->               
          <!---------- 图片下方的解释文字，由js控制 哪张图对应哪个链接 ------->
          <div class="box">
           <i class="mark"></i>
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           <a href="http://mbcaijing.baijia.baidu.com/article/755645" target="_blank" class="title" style="display:none">美女</a>
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          </div>
        </div>
        <!---------- 右下方四个点 ------->
        <div class="circles">
        <a href="http://guoshiliangbo.baijia.baidu.com/article/756806" class="circle" target="_blank" style="background:red"></a>
        <a href="http://yemacaijing.baijia.baidu.com/article/755797" class="circle" target="_blank"></a>
        <a href="http://mbcaijing.baijia.baidu.com/article/755645" class="circle " target="_blank"></a>
        <a href="http://junstapo.baijia.baidu.com/article/755717" class="circle " target="_blank" ></a>
        </div>
       </div>
       <!--------- 右击箭头--------->
       <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" id="widget_content_player_next" class="next carousel-btn-next">
        <span class="icon-wrap"><img src="image/右箭头.png"</span>
       </a>
      <!-- </div>-->
     </div>

.ShowEntry{
 height:inherit;
 width:70%;
 background:#00F;
 margin-right:10px;
 float:left;
 position:relative;
}
.ShowEntry .carousel-btn-prev, .ShowEntry .carousel-btn-next {
 position: absolute;
 top: 130px;
 width: 50px;
 height: 50px;
 z-index: 89; 
}
.addBgi{
 background-image:url(../image/%E5%9C%86.png);
 background-repeat: no-repeat;
}
.ShowEntry .carousel-btn-prev {
 left: 15px;
 background-position: -10px -95px\9;
 /*background-image:url(../image/%E5%B7%A6%E7%AE%AD%E5%A4%B4.png)*/
}
.ShowEntry .carousel-btn-next {
 right: 15px;
 background-position: -160px -95px\9;
}
.ShowEntry .icon-wrap {
 position: relative;
 display: block;
 margin: 10% 0 0 10%;
 width: 80%;
 height: 80%;
/* z-index:99;*/
}
.player {
 position: relative;
}
.player .imgview {
 /*width: 670px;*/
 height: 300px;
 position: relative;
 overflow: hidden;
 background: #ccc;
}
.circles{
 position: absolute;
 bottom: 20px;
 right: 0;
 width: 80px;
 height: 8px;
}
/*.player .circles .active*/
.active {
 background: red;
 opacity: 1;/*��ȫ��͸��*/
}
.player .circles .circle {
 width: 8px;
 height: 8px;
 border-radius: 50%;
 display: inline-block;
 background:#000;
 margin-left: 2px;
 opacity: .7;
}
.box{
 height:80px;
 width:100%;
 position:absolute;
 bottom:0;
}
.box .title {
 font-size: 18px;
 line-height: 70px;
 color: #fff;
 font-family: "΢���ź�","Hiragino Sans GB";
 display: block;
 text-align:center;
}
.box .title:hover {
 text-decoration: none;
 color: #e05a5a;
}

var index=0;
//周期：2秒 auto_play后不能加括号
var circulate=setInterval(auto_play,2000);//函数后面不能加括号
//自动播放
function auto_play(){
 //alert(index);
 if(index>=3)
 {index=0;}
 else {index=index+1;}
 changePic(index);
 /*$(".imgview img").css("display","none");*/
 //$(".imgview img").attr("src",imgs[index]);
 //alert(index);
}
//切换图片
 function changePic(index){
  //alert(index);
  $(".imgview a").css("display","none");
  $(".box a").css("display","none");
  $(".circles a").css("background","#000");
  //var src=$(".imgview a:eq("+index+")").attr("target");
  //alert(src);
  $(".imgview a:eq("+index+")").css("display","inline");
  $(".box a:eq("+index+")").css("display","block");
  $(".circles a:eq("+index+")").css("background","red");
  //alert(src);
 }
//鼠标进入播放区域 暂停播放
 $(".imgview").mouseenter(function(){
  //alert("hi!");
  clearInterval(circulate);
 })
 //鼠标移出播放区域 开始播放
 $(".imgview").mouseleave(function(){
  //alert("hi!");
  circulate=setInterval(auto_play,2000);
 })
 //鼠标移入序号圆点 切换到序号所对应图
 $(".circle").mouseenter(function(){
  //如何确定当前circle的序号？
  var num=$(this).index();
  //alert(num);
  clearInterval(circulate);
  changePic(num);
  circulate=setInterval(auto_play,2000);
 });
//点击左边箭头 切换到上一张
 $(".carousel-btn-prev").click(function(){
  clearInterval(circulate);
  //alert(index);
  //1.现在处在第几张 ：index;
  if(index==0)index=3;
  else index=index-1;
  changePic(index);
  circulate=setInterval(auto_play,2000);
 });
 //点击右边箭头 切换到下一张
 $(".carousel-btn-next").click(function(){
  clearInterval(circulate);
  //alert(index);
  //1.现在处在第几张 ：index;
  if(index==3)index=0;
  else index=index+1;
  changePic(index);
  circulate=setInterval(auto_play,2000);
 });