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HTML+JS+DOM【选项卡自动切换】

2024-08-18 00:56:34   218人阅读

最终效果图（鼠标无操作会自动切换选项卡）：

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  1 <!DOCTYPE html>
  2 <html>
  3 <head>
  4 <meta charset="gb2312" />
  5 <title>无标题文档</title>
  6 <style>
  7 body, ul, li {
  8     font-family:"黑体";
  9     margin:0;
 10     padding:0;
 11 }
 12 ul, li {
 13     list-style:none;
 14 }
 15 .tab {
 16     width:408px;
 17     margin:200px auto auto auto;
 18 }
 19 .hide {
 20     display:none;
 21 }
 22 #tab_head {
 23     height:31px;
 24     border-top:2px solid #03F;
 25     border-bottom:1px solid #090;
 26 }
 27 #tab_head li {
 28     float:left;
 29     width:100px;
 30     height:30px;
 31     line-height:30px;
 32     margin:0 0px;
 33     text-align:center;
 34     border:1px solid #ccc;
 35     border-bottom:none;
 36     background:#f5f5f5;
 37     cursor:pointer
 38 }
 39 #tab_head .current {
 40     position:relative;
 41     height:31px;
 42     margin-bottom:-1px;
 43     background:#fff;
 44 }
 45 #tab_body {
 46     border:1px solid #ccc;
 47     border-top:none;
 48     padding:20px;
 49     height:150px;
 50     text-indent:2em;
 51 }
 52 </style>
 53 <script>
 54 window.onload = function(){
 55   var tab_head = document.getElementById("tab_head");
 56   var tab_head_li = tab_head.getElementsByTagName("li");
 57   var tab_body = document.getElementById("tab_body");
 58   var tab_body_div = tab_body.getElementsByTagName("div");
 59   var len = tab_head_li.length;
 60   var i=0;
 61   var timer = null;
 62   var num=0;
 63   
 64       //1.进行初始化设置，设置每个导航的onmouseover和onmouseout的事件
 65    for(i=0; i<len; i++){
 66         tab_head_li[i].index = i;
 67         tab_head_li[i].onmouseover = function(){
 68              clearInterval(timer);
 69              num = this.index;
 70              tab_bodychange();
 71         }
 72         tab_head_li[i].onmouseout = function(){ autoplay(); }
 73    }
 74    
 75    //辅助函数，将num当前置为显示
 76   function tab_bodychange(){
 77    for(i=0; i<len; i++){
 78     tab_head_li[i].className = ‘‘;
 79     tab_body_div[i].className = ‘hide‘;
 80    }
 81    tab_head_li[num].className = ‘current‘;
 82    tab_body_div[num].className = ‘‘;
 83   }
 84   //辅助函数，自动循环改变
 85   function autoplay(){
 86    timer = setInterval(function(){num=(++num)%len;tab_bodychange();},500);
 87   }
 88   autoplay();//2.进入自动循环
 89  }
 90 </script>
 91 </head>
 92 <body>
 93 <div class="tab">
 94   <ul id="tab_head">
 95     <li class="current">HOME</li>
 96     <li>VIDEO</li>
 97     <li>IMAGE</li>
 98     <li>MUSIC</li>
 99   </ul>
100   <div id="tab_body">
101     <div>HOME 标签</div>
102     <div class="hide">VIDEO 标签</div>
103     <div class="hide">IMAGE 标签</div>
104     <div class="hide">MUSIC 标签</div>
105   </div>
106 </div>
107 </body>
108 </html>

 

HTML+JS+DOM【选项卡自动切换】


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