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Implementing the left and right switching effect of images based on javascript_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:18:171420browse

The example in this article introduces the detailed code of javascript to achieve the left and right switching effect of the image. It is shared with everyone for your reference. The specific content is as follows

Rendering:

Specific code: 

<html>
  <head>
    <title>JS图片左右切换效果</title>
    <meta charset="utf-8"/>
    <style type="text/css">
      *{
        margin:0;
        padding:0;       
      }    
         
      .images-scroll{
        border:1px solid #CCC;
        margin:100px auto;
        width:300px;
        height:200px;
        position:relative;
      }  
       
      .images-scroll ul{
        list-style:none;
      }
 
      .images-scroll li{
        float:left; 
        display:none;      
      }
 
      .images-scroll .active{
        display:block;
      }
 
      .images-scroll a{
         
      }
 
      .images-scroll img{
        width:300px;
        height:200px;
        border:none;
      }            
       
      .images-scroll .left-scroll{
        position:absolute;
        top:40%;
        left:-40px;
        opacity:0;
        background:url("images/bg_direction_nav.png");
        background-repeat:no-repeat;
        background-position:0px 0px;
        height:27px;
        width:27px;
        cursor:pointer;
      }
 
      .images-scroll .right-scroll{
        position:absolute;
        top:40%;
        opacity:0;
        right:-40px;
        background:url("images/bg_direction_nav.png");
        background-repeat:no-repeat;
        background-position:-30px 0px;
        height:27px;
        cursor:pointer;
        width:27px;       
      }  
 
      .images-scroll .right-scroll:hover{
        background-color:transparent;
      }
 
    </style>
    <script src="jquery-1.8.2.js"></script>
  </head>
  <body>
     
    <div id="images-scroll" class="images-scroll">
      <ul>
        <li class="active"><a href=""><img src="images/1.jpg" alt=""></a></li>
        <li><a href=""><img src="images/2.jpg" alt=""></a></li>
        <li><a href=""><img src="images/3.jpg" alt=""></a></li>
        <li><a href=""><img src="images/4.jpg" alt=""></a></li>
      </ul>
      <span id="left-scroll" class="left-scroll"></span>
      <span id="right-scroll" class="right-scroll"></span>
    </div>
    <script type="text/javascript">  
 
      $("#images-scroll").mouseover(function(){
        $("#left-scroll").animate({left: '10px',opacity:'1',},400);
        $("#right-scroll").animate({right: '10px',opacity:'1',},400);
      })
      $("#images-scroll").mouseleave(function(){
        $("#left-scroll").animate({left: '-40px',opacity:'0',},400);
        $("#right-scroll").animate({right: '-40px',opacity:'0',},400);        
      })
 
      imgScroll=setInterval("runScroll()",3000);
      var last_idx=$("#images-scroll ul li").index($("#images-scroll ul li:last"));
      function runScroll(){          
        var idx=$("#images-scroll ul li").index($("#images-scroll ul .active")[0]);
        $("#images-scroll li").eq(idx).removeClass("active").hide();
        idx+=1;
        if(idx%(last_idx+1)==0){
          idx=0;
        }
        $("#images-scroll li").eq(idx).addClass("active").show();
      }
      $("#left-scroll").click(function(){
        var idx=$("#images-scroll ul li").index($("#images-scroll ul .active")[0]);
        $("#images-scroll li").eq(idx).removeClass("active").hide();
        idx-=1;
        if(idx==-1){
          idx=last_idx;
        }
        $("#images-scroll li").eq(idx).addClass("active").show();
      })
      $("#right-scroll").click(function(){
        runScroll();
      })     
    </script>
     
  </body>
</html>

The above is the entire content of this article. I hope it will be helpful to everyone in learning javascript programming.

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