lovecoding
/
web0331


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        margin: 0;
        padding: 0;
        list-style: none;
        text-decoration: none;
        box-sizing: border-box;
      }
      #container {
        width: 488px;
        margin: 150px auto;
      }
      #list {
        overflow: hidden;
      }
      #list li {
        float: left;
        width: 120px;
        height: 50px;
        text-align: center;
        line-height: 50px;
        border: 1px solid #ccc;
      }
      .selected {
        color: red;
        background-color: yellow;
      }
      .main .active {
        width: 480px;
        height: 300px;
        text-align: center;
        line-height: 300px;
        display: none;
        border: 1px solid red;
      }
      .main .choose {
        display: block;
      }
    </style>
  </head>
  <body>
    <div id="container">
      <ul id="list">
        <li class="selected">选项一</li>
        <li>选项二</li>
        <li>选项三</li>
        <li>选项四</li>
      </ul>
      <div class="main">
        <div class="active choose">1</div>
        <div class="active">2</div>
        <div class="active">3</div>
        <div class="active">4</div>
      </div>
    </div>
    <script>
      var btn = document.querySelectorAll("#list li");
      var contain = document.querySelectorAll(".main div");
      for (var i = 0; i < btn.length; i++) {
        btn[i].index = i;
        btn[i].onclick = function () {
          for (var j = 0; j < contain.length; j++) {
            btn[j].className = "";
            contain[j].className = "active";
          }
          console.log(this,'this',this.index)
          this.className = 'selected';
          contain[this.index].className='active choose'
        };
      }
    //  onmousemove onmouseout onclick
    </script>
  </body>
</html>