這次帶給大家JS實作下拉選單登入註冊彈窗，JS實作下拉選單登入註冊彈窗的注意事項有哪些，下面就是實戰案例，一起來看一下。
下拉選單清單
<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>
<p class="menu">
<p class="btn">罗兰首页</p>
<p class="btn">歌曲专栏
<ul>
<li>流行</li>
<li>摇滚</li>
<li>蓝调</li>
<li>民谣</li>
</ul>
</p>
<p 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>
</p>
<p 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>
</p>
<p 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>
</p>
<p class="btn">魅力ROLAND体验区
<ul>
<li>新曲</li>
<li>唱片</li>
<li>MV</li>
</ul>
</p>
</p>
</body>登入註冊效果
<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-p {
width: 500px;
height: 300px;
background-color: white;
position: fixed;
z-index: 99;
}
</style>
</head>
<body>
<p class="mask" hidden></p>
<p class="log-p" hidden="hidden"></p>
<p class="login">登 录</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><p>123</p>
</body>
</html>
<script>
var mask = document.getElementsByClassName("mask")[0];
var login = document.getElementsByClassName("log-p")[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>對相關方面進行閱讀之前閱讀它有關了更多內容？ ！
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