lovecoding
/
VIP22


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    ul {
      list-style: none;
    }

    #container {
      width: 590px;
      height: 470px;
      margin: 100px auto;
      position: relative;
    }

    #img-box img {
      position: absolute;
      opacity: 0;
      transition: opacity 1s linear;
    }

    #img-box .selected {
      opacity: 1;
    }

    #btns li {
      width: 20px;
      height: 20px;
      background: purple;
      color: white;
      text-align: center;
      line-height: 20px;
      border-radius: 10px;
      margin-right: 5px;
      float: left;
    }

    #btns {
      position: absolute;
      right: 10px;
      bottom: 10px;
    }

    #btns .select {
      background: red;
    }
  </style>
</head>

<body>
  <div id="container">
    <div id="img-box">
      <img class="selected" src="image/1.jpg" alt="">
      <img src="image/2.jpg" alt="">
      <img src="image/3.jpg" alt="">
      <img src="image/4.jpg" alt="">
      <img src="image/5.jpg" alt="">
    </div>
    <ul id="btns">
      <li class="select">1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
      <li>5</li>
    </ul>
    <script>
      var btns = document.getElementsByTagName('li')
      var imgs = document.getElementsByTagName('img')
      for (var i = 0; i < btns.length; i++) {
        btns[i].index = i
        btns[i].onclick = function () {
          for (var j = 0; j < btns.length; j++) {
            btns[j].className = ''
            imgs[j].className = ''
          }
          this.className = 'select'
          imgs[this.index].className = 'selected'
        }
      }
    </script>
  </div>
</body>

</html>