二级菜单 

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>

  <style type="text/css">
    * {
      margin: 0;
      padding: 0;
    }

    .contain {
      width: 80%;
    height: 400px;
      margin: 30px auto;
      border:1px solid black;

    }
    .contain div{
      float: left;
    }
    #left{
      width: 20%;
      height: 100%;
      background: cyan;
    }
    #right{
      width: 80%;
      height: 100%;
      background: pink;
      display: none;
    }
    #left ul{
      width: 100%;
      height: 30px;
      list-style: none;
      margin: 10px 0px;
    }

  </style>
</head>
<body>

<div class="contain">
  <div id="left">
    <ul>
      <li>1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
      <li>5</li>
    </ul>
  </div>
  <div id="right">购买物品信息</div>

</div>

</body>
</html>
<script type="text/javascript">
  var left = document.getElementsByTagName("li");
  var elementById = document.getElementById("right");
  for(var i=0;i<left.length;i++){
    +function (index) {
      left[index].onmouseover=function () {
        for (let j = 0; j < left.length; j++) {
          left[j].style.color="black";
        }
        left[index].style.color="pink";
        elementById.style.display="block";
        elementById.innerHTML="购买物品信息"+index;
      }
      left[index].onmouseleave=function () {
        for (let j = 0; j < left.length; j++) {
          left[j].style.color="black";
        }
        elementById.style.display="none";
      }
    }(i)
  }
</script>
posted @ 2024-05-13 00:37  King-DA  阅读(5)  评论(0)    收藏  举报