JS实现下拉菜单列表与登录注册弹窗效果

2024-05-06 16:38:53

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下拉菜单列表

<style>    *{      margin: 0px;      padding: 0px;    }    .menu{      width: 1100px;      height: 30px;      background-image: url(img/魅力罗兰Music炫图18.jpg);      margin-left: 200px;      margin-top: 50px;    }    .btn{      width: 183.3px;      height: 30px;      float: left;      text-align: center;      line-height: 30px;      font-size: 14px;      position: relative;      overflow: hidden;      transition: 0.5s;    }    .btn:hover{      cursor: pointer;      background-color: burlywood;      color: white;      max-height: 200px;      overflow: visible;    }    .btn ul{      list-style: none;      background-color: #008000;    }      </style>    <body>    <div class="menu">      <div class="btn">罗兰首页</div>      <div class="btn">歌曲专栏        <ul>          <li>流行</li>          <li>摇滚</li>          <li>蓝调</li>          <li>民谣</li>        </ul>      </div>      <div class="btn">音乐人专栏        <ul>          <li>内地</li>          <li>欧美</li>          <li>日韩</li>          <li>港台</li>        </ul>      </div>      <div class="btn">乐器专栏        <ul>          <li>钢琴</li>          <li>小提琴</li>          <li>吉他</li>          <li>架子鼓</li>        </ul>      </div>      <div class="btn">戏曲专栏        <ul>          <li>京剧</li>          <li>话剧</li>          <li>豫剧</li>          <li>黄梅戏</li>        </ul>      </div>      <div class="btn">魅力ROLAND体验区        <ul>          <li>新曲</li>          <li>唱片</li>          <li>MV</li>        </ul>      </div>    </div>      </body>

登录注册弹窗效果

<html>  <head>    <meta charset="UTF-8">    <title></title>    <style>      * {        margin: 0px;        padding: 0px;      }            .login {        width: 100px;        height: 30px;        font-size: 25px;        line-height: 30px;        border: 1px solid black;        text-align: center;        background-color: darkcyan;        color: white;      }            .login:hover {        cursor: pointer;        background-color: greenyellow;      }            .mask {        width: 100%;        background-color: black;        opacity: 0.5;        position: absolute;        top: 0px;        left: 0px;        z-index: 90;      }            .log-div {        width: 500px;        height: 300px;        background-color: white;        position: fixed;        z-index: 99;      }    </style>  </head>  <body>    <div class="mask" hidden></div>    <div class="log-div" hidden="hidden"></div>    <div class="login">登 录</div>    <p>123</p><p>123</p><p>123</p><p>123</p><p>123</p><p>123</p><p>123</p>    <p>123</p><p>123</p><p>123</p><p>123</p><p>123</p><p>123</p><p>123</p>    <p>123</p><p>123</p><p>123</p><p>123</p><p>123</p><p>123</p><p>123</p>    <p>123</p><p>123</p><p>123</p><p>123</p><p>123</p><p>123</p>  </body></html><script>  var mask = document.getElementsByClassName("mask")[0];  var login = document.getElementsByClassName("log-div")[0];  var btn = document.getElementsByClassName("login")[0];  var clientWidth = document.body.clientWidth;  var clientHeight = document.documentElement.clientHeight;  login.style.left = clientWidth / 2 - 250 + "px";  login.style.top = clientHeight / 2 - 150 + "px";    mask.style.height = document.body.clientHeight + "px";  window.onresize = function() {    var clientWidth = document.body.clientWidth;    var clientHeight = document.documentElement.clientHeight;    login.style.left = clientWidth / 2 - 250 + "px";    login.style.top = clientHeight / 2 - 150 + "px";  }    btn.onclick = function(){    mask.removeAttribute("hidden");    login.removeAttribute("hidden");  }    mask.onclick = function(){    mask.setAttribute("hidden","");    login.setAttribute("hidden","hidden");  }</script>

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