jq实现多banner效果图

时间：2021-01-10 11:32:06
 <!DOCTYPE html>

 <html>

 <head>

     <meta charset="UTF-8" />

     <title>多banner效果</title>

     <meta name="keywords" content="" />

     <meta name="description" content="" />

     <style>

         *{margin:0;padding:0;}

         ul,li{list-style:none;}

         .banner{width:280px;height:210px;margin:20px auto;overflow:hidden;position:relative;}

         .banner .bannerul li{width:280px;height:210px;}

         .banner .prev,.next{display:block;width:30px;height:50px;color:#fff;font-size:22px;

             background:rgba(0,0,0,0.5);position:absolute;top:85px;text-decoration:none;

             text-align:center;line-height:50px;

         }

         .banner .prev{left:0;}

         .banner .next{right:0;}

     </style>

 </head>

 <body>

     <div class="banner">

         <ul class="bannerul">

             <li><img src="data:images/337622.jpg" /></li>

             <li><img src="data:images/335897.jpg" /></li>

             <li><img src="data:images/336767.gif" /></li>

         </ul>

         <a href="#" class="prev">&lt;</a>

         <a href="#" class="next">&gt;</a>

     </div>

     <div class="banner">

         <ul class="bannerul">

             <li><img src="data:images/337622.jpg" /></li>

             <li><img src="data:images/335897.jpg" /></li>

             <li><img src="data:images/336767.gif" /></li>

         </ul>

         <a href="#" class="prev">&lt;</a>

         <a href="#" class="next">&gt;</a>

     </div>

     <div class="banner">

         <ul class="bannerul">

             <li><img src="data:images/337622.jpg" /></li>

             <li><img src="data:images/335897.jpg" /></li>

             <li><img src="data:images/336767.gif" /></li>

         </ul>

         <a href="#" class="prev">&lt;</a>

         <a href="#" class="next">&gt;</a>

     </div>

     <script type="text/javascript" src="js/jquery-1.11.3.min.js"></script>

     <script type="text/javascript">

         $(function(){

             var $li = $(".bannerul").find("li");

             var $lastli = $li.last().clone();

             var $firstli = $li.first().clone();

             $(".bannerul").append($firstli);

             $(".bannerul").prepend($lastli);

             var $lih = $li.height();

             var $len = $li.length/$(".banner").find(".bannerul").length;

             $(".bannerul").css({"marginTop":$lih*-1});

             $(".next").click(function(){

                 var $ul = $(this).parent(".banner").find(".bannerul");

                 var index = ($ul.data("index"))||1;

                 index ++;

                 $ul.stop(true,true).animate({"marginTop":index*$lih*-1},function(){

                     if(index==$len+1){

                         $(this).css({"marginTop":$lih*-1});

                         index = 1;

                     }

                     $ul.data("index",index);

                 });

             });

             $(".prev").click(function(){

                 var $ul = $(this).parent(".banner").find(".bannerul");

                 var index = ($ul.data("index"))||1;

                 index --;

                 $ul.stop(true,true).animate({"marginTop":index*$lih*-1},function(){

                     if(index==0){

                         $(this).css({"marginTop":$len*$lih*-1});

                         index = $len;

                     }

                     $ul.data("index",index);

                 });

             });

         });

     </script>

     <!--

     337622.jpg

     335897.jpg

     336767.gif

     334732.jpg

     333308.png

     -->

 </body>

 </html>

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