前端html+css+js弹窗的实现

近期由于项目需要，学习了一下js弹窗的实现，感觉挺简单的。

html代码部分：

<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>弹窗</title>
	<link rel="stylesheet" type="text/css" href="弹窗.css">
	
</head>
<body>
	<button id="open_btn" class="btn">弹窗</button>
	<!-- 弹窗内容开始 -->
	<div id="background" class="back">
		<div id="div1" class="content">
			<div id="close">
				<span id="close-button">×</span>
				<h2>弹窗头部</h2>
			</div>
			<div id="div2">
				<h3>弹窗标题</h3>
				<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Iste, ullam, nisi, enim laboriosam ea cum necessitatibus ipsum cupiditate neque soluta qui autem odit eligendi blanditiis voluptatem repellat suscipit quia perspiciatis.</p>
			</div>
			<h3 id="foot">底部内容</h3>
		</div>
	</div>
	<!-- 弹窗内容结束 -->
	<script src="弹窗.js"></script>
</body>
</html>

css代码部分：

body{
	font-family: Arial,Helvetica,sans-serif;
	font-size: 17px;
	text-align: 1.5;
}

#open_btn {
	background: #009900;
}

#background {
	display: none;
	position: fixed;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0,0,0,0.5);
}

#div1 {
	background:#eeeeee;
	width: 70%;
	z-index: 1;
	margin: 12% auto;
	overflow: auto;
}

span {
	color: white;
	padding-top: 12px;
	cursor: pointer;
	padding-right: 15px;
}

#div2 {
	background:#eeeeee;
	margin: auto;
	height: 300px;
	padding: 0 20px;
}

#close {
	padding: 5px;
	background: #5cd31b;
}

#close-button {
	float: right;
	font-size: 30px;
}

#foot {
	padding: 5px 0;
	text-align: center;
	background: #5cd31b;
	color: white;
}

h2 {
	margin: 10px 0;
	color: white;
	padding-left: 15px;
}

h3 {
	margin: 0 0px;
	padding-top: 15px;
}

js代码部分：

var btn = document.getElementById('open_btn');
var div = document.getElementById('background');
var close = document.getElementById('close-button');

btn.onclick = function show() {
	div.style.display = "block";
}

close.onclick = function close() {
	div.style.display = "none";
}

window.onclick = function close(e) {
	if (e.target == div) {
		div.style.display = "none";
	}
}

实现效果如下：

前端html+css+js弹窗的实现

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