非常实用的弹出遮罩层

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta charset="UTF-8">
<title>jQuery弹出层</title>

<script src="js/jquery-3.2.1.min.js" type="text/javascript" charset="utf-8"></script>
<style>
.black_overlay {
display: none;
position: absolute;
top: 0%;
left: 0%;
100%;
height: 100%;
background-color: black;
z-index: 1001;
-moz-opacity: 0.8;
opacity: .80;
filter: alpha(opacity=80);
}

.white_content {
display: none;
position: absolute;
top: 10%;
left: 10%;
80%;
height: 80%;
border: 16px solid lightblue;
background-color: white;
z-index: 1002;
overflow: auto;
}

.white_content_small {
display: none;
position: absolute;
top: 20%;
left: 30%;
40%;
height: 50%;
border: 16px solid lightblue;
background-color: white;
z-index: 1002;
overflow: auto;
}
</style>
<script type="text/javascript">
//弹出隐藏层
function ShowDiv(show_div, bg_div) {
document.getElementById(show_div).style.display = 'block';
document.getElementById(bg_div).style.display = 'block';
var bgdiv = document.getElementById(bg_div);
bgdiv.style.width = document.body.scrollWidth;
// bgdiv.style.height = $(document).height();
$("#" + bg_div).height($(document).height());
};
//关闭弹出层
function CloseDiv(show_div, bg_div) {
document.getElementById(show_div).style.display = 'none';
document.getElementById(bg_div).style.display = 'none';
};
</script>
</head>

<body>
<input id="Button1" type="button" value="点击弹出层" onclick="ShowDiv('MyDiv','fade')" />

<div id="fade" class="black_overlay">
</div>
<div id="MyDiv" class="white_content">
<div style="text-align: right; cursor: default; height: 40px;">
<span style="font-size: 16px;" onclick="CloseDiv('MyDiv','fade')">关闭</span>
</div>
目前来说，我还是喜欢这个自己改造的弹出层。自己在项目中也用的是这个。
</div>
</body>

</html>