jquery实现自适应banner焦点图

效果如下：

代码如下：

 
 
  @charset "UTF-8";
  
  body, ul, dl, dd, dt, ol, li, p, h1, h2, h3, h4, h5, h6, textarea, form, select, fieldset, table, td, div, input {
   margin: 0;
   padding: 0;
   -webkit-text-size-adjust: none;
  }
  h1, h2, h3, h4, h5, h6 {
   font-size: 12px;
   font-weight: normal;
  }
  body > div {
   margin: 0 auto;
  }
  div {
   text-align: left;
  }
  a img {
   border: 0;
  }
  body {
   color: #333;
   text-align: center;
   font: 12px "宋体";
  }
  ul, ol, li {
   list-style-type: none;
   vertical-align: 0;
  }
  a {
   outline-style: none;
   color: #535353;
   text-decoration: none;
  }
   a:hover {
    color: #D40000;
    text-decoration: none;
   }
  
  
  .lit {
   position: absolute;
   z-index: 999;
   margin-top: 10px;
  }
   .lit p {
    margin-bottom: 2px;
   }
   .lit a:hover {
    filter: alpha(opacity=80);
    opacity: 0.8;
   }
  .wrapper {
   width: 986px;
   margin: 0 auto;
   position: relative;
   height: 390px;
  }
  #banner {
   width: 100%;
   height: 390px;
   background: none;
   overflow: hidden;
   position: relative;
  }
  #banner_img {
   display: block;
   position: relative;
  }
   #banner_img li {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background-position: center;
    background-size: cover;
    display: none;
   }
    
    
   
   #banner_img .ad_img {
    position: absolute;
    right: 10px;
    top: 80px;
    width: 506px;
    height: 404px;
   }
   #banner_img .ad_txt {
    position: absolute;
    left: 10px;
    top: 170px;
    color: #fff;
    text-shadow: 1px 1px rgba(51, 51, 51, 0.3);
   }
    #banner_img .ad_txt h2 {
     font: bold 36px/60px Microsoft YaHei;
    }
    #banner_img .ad_txt a {
     display: block;
     width: 100px;
     height: 25px;
     line-height: 25px;
     text-align: center;
     margin-top: 10px;
     background: #fff;
     color: #666;
    }
  #banner_ctr {
   position: absolute;
   width: 960px;
   height: 122px;
   margin-left: -90px;
   left: 35%;
   bottom: -75px;
   z-index: 1;
  }
   #banner_ctr ul {
    width: 100%;
   }
   #banner_ctr li {
    float: left;
    display: inline-block;
    height: 27px;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
   }
  .styclsa {
   line-height: 27px;
   background: url(http://smzdqiang.com/data/attachment/forum/201609/20/161609g5xjijj1x5lgiq4j.png) no-repeat;
   height: 27px;
   color: #ffffff;
   font-size: 12.48px;
   padding: 0px 0px 0 0px;
   width: 119px;
   margin: 0 auto;
   overflow: hidden;
   font-family: "宋体";
   zoom: 1;
  }

  .astysa {
   color: #ffffff;
   font-size: 12.48px;
   text-align: center;
  }

  #drag_ctr {
   position: absolute;
   top: -5px;
   cursor: pointer;
   left: 0px;
   width: 119px;
   height: 32px;
   bottom: 120px;
   background: url(http://smzdqiang.com/data/attachment/forum/201609/20/161611aooapbzu0da7oand.png) no-repeat;
   padding: 0px 0px 0 0px;
   margin: 0 auto;
   overflow: hidden;
   color: #fff;
   filter: alpha(opacity=50);
   color: #ffffff;
  }
  
 
 




 
 

 

 

 


 

  

 

 

 

 

 
 
 
 
 

 

 
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